Recent major update: (March 16, 2018) Added 2 upcoming shows, added some finale dates.
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Start dates for most of the sci-fi/fantasy shows so none of us miss the first episode of our favorite shows or new shows. I try to keep this list fairly up-to-date so that everyone can see at a glance what shows are currently running and what shows will be starting soon. Links to IMDb pages when they exist.
(r) = renewed
(c) = to be canceled
(f) = final season

On Now: Day Station Genre Hiatus
iZombie Monday CW Zombie Cops May.28
Legends of Tomorrow Monday CW Super Heroes Apr.9 (r?)
Lucifer Monday Fox Supernatural May 7
Black Lightning Tuesday CW Super Heroes Apr.17 (r?)
X-Files Wednesday Fox Sci-Fi Mar.21
The Magicians Wednesday Syfy Modern Fantasy Apr.4 (r)
Gotham Thursday Fox Young Batman May? (r?)
Beyond Thursday Freeform Supernatural Mar.22
Agents of S.H.I.E.L.D. Friday ABC Super Heroes May 18 (c?)
Once Upon a Time Friday ABC Modern Fantasy May 18 (c)
The Walking Dead Sunday AMC Post-Apocalyptic Horror Apr.15 (r)
Timeless Sunday NBC Time Travel May ?
Ash vs. Evil Dead Sunday Starz Supernatural Apr.29
Counterpart Sunday Starz Sci-Fi Spy Mar.25

Online: Date Direct Link Genre Season
Electric Dreams Now Amazon Sci-Fi Anthology Season 1
Altered Carbon Now Netflix Cyberpunk Sci-Fi Season 1 (r)
The Frankenstein Chronicles Now Netflix Supernatural Season 2
The Tick Now Amazon Super Heroes Season 1 (r)
Hard Sun Now Hulu Pre-Apocalyptic Season 1
Jessica Jones Now Netflix Super Hero Season 2
Santa Clarita Diet Mar.23 Netflix Zombies Season 3
A Series of Unfortunate Events Mar.30 Netflix Adventure Season 2 (rf)
Lost in Space Apr.13 Netflix Sci-Fi Season 1
The Handmaid's Tale Apr.25 Hulu Dystopian Future Season 2
The Man in the High Castle Spring Amazon Alternate Reality Season 3
3% Spring? Netflix Dystopian Future Season 2
The OA Spring? Netflix Supernatural Season 2
Sense8 Spring? Netflix Sci-Fi Finale
Luke Cage Jun.22 Netflix Super Hero Season 2
Castle Rock Summer Hulu Stephen King Season 1
Star Trek: Discovery Fall CBS All Access Sci-Fi Season 2
Future Man Fall? Hulu Time Travel Comedy Season 2
Runaways Fall? Hulu Super Heroes Season 2
Daredevil Fall Netflix Super Hero Season 3
Stranger Things Fall? Netflix Supernatural Season 2 (r)
The Last Kingdom Fall? Netflix Saxons Season 3
(untitled Polish) Fall Netflix Alternate Reality Season 1
(untitled Turkish) Fall Netflix Super Heroes Season 1
Amazing Stories 2018 Apple Anthology Season 1
See 2018? Apple Sci-Fi Season 1
(untitled) 2018? Apple Space Sci-Fi Season 1
The Twilight Zone 2018 CBS All Access Anthology Season 1
Titans 2018 DC Digital Super Heroes Season 1
The First 2018 Hulu Sci-Fi Season 1
Myst 2018? Hulu Supernatural Season 1
Again 2018 Netflix Supernatural (India) Season 1
Chilling Adventures of Sabrina 2018 Netflix Super Hero Season 1 (r)
Dark 2018? Netflix Supernatural Season 2
Ghoul 2018? Netflix Supernatural Season 1
Iron Fist 2018? Netflix Super Hero Season 2
MST 3000 2018 Netflix Sci-Fi Mockery Season 12
The Dark Crystal 2018 Netflix Fantasy Season 1
Tidelands 2018 Netflix Sirens Season 1
The Innocents 2018 Netflix Supernatural Season 1
The Umbrella Academy 2018 Netflix Super Heroes Season 1
The Witcher 2018 Netflix Fantasy Season 1
Osmosis 2018 Netflix Sci-Fi Season 1
Wellington Paranormal 2018? ? Supernatural Comedy Season 1
Britannia Winter? Amazon Celtic Season 2
Black Mirror Winter? Netflix Sci-Fi Anthology Season 5
Travelers Winter? Netflix Time Travel Season 3
Carnival Row 2019 Amazon Fantasy Season 1
Consider Phlebas 2019? Amazon Sci-Fi Season 1
Good Omens 2019 Amazon Post Apocalyptic Mini-Series
The Boys 2019 Amazon Super Heroes Season 1
The Lord of the Rings 2019? Amazon Fantasy Season 1 (r x4)
The Defenders 2019? Netflix Super Heroes Season 2
The Punisher 2019 Netflix Super Hero Season 2

Upcoming: When Station Genre Finale
Last Man on Earth Mar.18 Fox Post-Apocalyptic Comedy May?
Shadowhunters Mar.20 Freeform Mortal Instruments Jul?
Krypton Mar.21 Syfy Super Heroes May?
The Terror Mar.26 AMC Supernatural May 21?
Arrow Mar.29 CW Super Heroes May 17 (r?)
Supernatural Mar.29 CW Supernatural May 17 (r?)
Siren Mar.29 Freeform Mermaids May?
The Crossing Apr.2 ABC Sci-Fi
Legion Apr.3 FX Super Heroes
The Flash Apr.10 CW Super Heroes May 22 (r?)
The Expanse Apr.11 Syfy Space Opera Sci-Fi
Fear The Walking Dead Apr.15 AMC Zombies
Supergirl Apr.16 CW Super Hero Jun.18 (r?)
The Originals Apr.20 CW Vampire Diaries spin-off (f)
Into The Badlands Apr.22 AMC Martial Arts
Westworld Apr.22 HBO Artificial Intelligence Sci-Fi
The 100 Apr.24 CW Post-Apocalyptic
Good Witch Apr.29 Hallmark Witches
Humans Spring? AMC Androids
Ghosted Spring Fox Sci-Fi Comedy (r?)
Misfits Spring? Freeform Not So Super Heroes
12 Monkeys Spring? Syfy Time Travel (f)
Colony Spring? USA Sci-Fi
Cloak & Dagger Jun.7 Freeform Super Heroes
Outcast Jul.? Cinemax Supernatural
Preacher Summer? AMC Supernatural
The Outpost Summer CW Fantasy
Vikings Summer? History Vikings (r)
Reverie Summer NBC Virtual Reality
American Gods Summer? Starz Supernatural
Cleverman Summer? Sundance Sci-Fi
Killjoys Summer Syfy Space Sci-Fi (rf)
Wynonna Earp Summer Syfy Supernatural
People of Earth Summer? TBS Sc-Fi-ish
The Last Ship Summer TNT Post-Apocalyptic
Misfits & Monsters Summer truTV Anthology
Doctor Who Oct? BBC America Sci-Fi (r x3)
The Gifted Fall Fox Super Heroes
The Orville Fall Fox Sci-Fi Dramedy
American Horror Story Fall FX Supernatural Horror (r)
Stan Against Evil Fall IFC Supernatural Comedy
Midnight, Texas Fall NBC Supernatural
The Good Place Fall NBC Supernatural
Outlander Fall? Starz Time Travel
Happy! Fall? Syfy Supernatural
Van Helsing Fall Syfy Vampires
Z Nation Fall Syfy Zombies
Mr. Robot Fall? USA Sci-Fi
Wizard and Glass 2018 ? The Dark Tower
New Warriors 2018 Freeform Super Heroes
Con Man 2018? Syfy Sci-Fi-ish
Snowpiercer 2018? TNT Sci-Fi
Game of Thrones Winter? HBO Fantasy (f)
Channel Zero Winter? Syfy Horror Anthology
Falling Water Winter? USA Supernatural
Nightflyers 2019? Syfy Sci-Fi

Past Shows: Status Station Genre Finale
Kevin(Probably)Saves the World Canceled? ABC Supernatural Mar.6, 2018
Star Wars: Rebels Finished Disney XD Animated Sci-Fi Mar.5, 2018
The Librarians Canceled TNT Supernatural Feb.7, 2018
Superstition Canceled? Syfy Supernatural Jan.18, 2018
Ghost Wars Canceled? Syfy Supernatural Jan.4, 2017
Dirk Gently Canceled BBC America Holistic Dec.16, 2017
The Exorcist Canceled? Fox Supernatural Dec.15, 2017
Halfworlds Finished HBO Now Supernatural Dec.1, 2017
The Teenage Psychic Finished HBO Now Supernatural Dec.1, 2017
Glitch Canceled? Netflix Resurrection Nov.28, 2017
The Shannara Chronicles Canceled Spike Fantasy Nov.22, 2017
Extinct Canceled BYUtv Sci-Fi Nov.19, 2017
Inhumans Canceled ABC Super Heroes Nov.10, 2017
Sea Oak Canceled Amazon Supernatural Comedy Nov.10, 2017
Freakish Canceled? Hulu Zombies Oct.18, 2018
Teen Wolf Finished MTV Werewolves Sep.24, 2017
Zoo Canceled CBS Sci-Fi Thriller Sep.21, 2017
Somewhere Between Canceled ABC Groundhog Day Sep.19, 2017
The Strain Finished FX Vampires Sep.17, 2017
Blood Drive Canceled Syfy Post-Apocalyptic Grindhouse Sep.6, 2017
Twin Peaks Finished Showtime Supernatural Sep.3, 2017
Dark Matter Canceled Syfy Space Sci-Fi Aug.25, 2017
The Mist Canceled Spike Stephen King Aug.24, 2017
Stitchers Canceled Freeform Sci-Fi Aug.14, 2017
Orphan Black Finished BBC America Clones Aug.12, 2017
The Leftovers Finished HBO Post-Apocalyptic Jun.4, 2017
Class Canceled BBC America Doctor Who Spin-off Jun.3, 2017
Making History Canceled Fox Time Comedy May 21, 2017
Dimension 404 Canceled Hulu Sci-Fi Anthology Apr.25, 2017
Powerless Canceled NBC Super Hero Comedy Apr.20, 2017
Black Sails Finished Starz Pirates Apr.2, 2017
Sleepy Hollow Canceled Fox Supernatural Mar.31, 2017
Grimm Finished NBC Supernatural Mar.31, 2017
Time After Time Canceled ABC Time Travel Mar.26, 2017
Oasis Canceled Amazon Sci-Fi Mar.17, 2017
The Vampire Diaries Finished CW Vampires Mar.10, 2017
Emerald City Canceled NBC Wizard of Oz Mar.3, 2017
Incorporated Canceled Syfy Sci-Fi Thriller Feb.1, 2017
Frequency Canceled CW Time Travel-ish Jan.25, 2017
Salem Canceled WGN Supernatural Horror Jan.25, 2017
Aftermath Canceled Syfy Post-Apocalyptic Dec.20, 2016
Crazyhead Canceled Netflix Supernatural Dec.16, 2016
From Dusk Till Dawn Canceled El Rey Supernatural Nov.1, 2016
The Living and the Dead Canceled BBC America Supernatural Oct.27, 2016
Beauty and the Beast Finished CW Cyborg Sep.15, 2016
BrainDead Canceled CBS Comedy Sci-Fi Thriller Sep.11, 2016
Dead of Summer Canceled Freeform Supernatural Aug.30, 2016
Between Canceled Netflix Sci-Fi Aug.4, 2016
Wayward Pines Canceled Fox Sci-Fi Jul.27, 2016
Powers Canceled Playstation Super Heroes Jul.19, 2016
Containment Finished CW Viral Outbreak Jul.19, 2016
Hunters Canceled Syfy Sci-Fi Jul.11, 2016
Marco Polo Canceled Netflix Epic Adventure Jul.1, 2016
Person of Interest Finished CBS Artificial Intelligence Sci-Fi Jun.21, 2016
Penny Dreadful Canceled Showtime Supernatural Horror Jun.19, 2016
The Musketeers Finished Hulu Adventure Jun.1, 2016
Damien Canceled A&E Supernatural May 9, 2016
Limitless Canceled CBS Sci-Fi Apr.26, 2016
Bitten Finished Syfy Werewolves Apr.25, 2016
Deadbeat Canceled Hulu Ghosts Apr.20, 2016
Beowulf Canceled Esquire Midieval Apr.16, 2016
11.22.63 Finished Hulu Time Travel Apr.4, 2016
You, Me and the Apocalypse Canceled NBC Post-Apoc Comedy Mar.31, 2016
Second Chance Canceled Fox Frankenstein Sci-Fi Mar.25, 2016
Lost Girl Finished Syfy Supernatural Mar.21, 2016
Agent Carter Canceled ABC Super Heroes Mar.1, 2016
Galavant Canceled ABC Fairy Tale Comedy Jan.31, 2016
Heroes Reborn Canceled NBC Heroes mini-series Jan.21, 2016
Da Vinci's Demons Finished Starz Historical Fantasy Dec.26, 2015
The Returned (French) Finished Sundance Resurrection Dec.19, 2015
Haven Finished Syfy Supernatural Dec.17, 2015
Childhood's End Finished Syfy Alien mini-series Dec.16, 2015
Minority Report Canceled Fox Sci-Fi Cops Nov.30, 2015
South of Hell Canceled WE tv Supernatural Nov.27, 2015
The Bastard Executioner Canceled FX Medieval Knights Nov.17, 2015
Hemlock Grove Finished Netflix Supernatural Oct.23, 2015
Continuum Finished Syfy Time Travel Oct.16, 2015
Dominion Canceled Syfy Supernatural Oct.1, 2015
Under The Dome Canceled CBS Sci-Fi Sep.10, 2015
Extant Canceled CBS Sci-Fi Sep.9, 2015
The Whispers Canceled ABC Bradbury's Zero Hour Aug.31, 2015
Falling Skies Finished TNT Alien Sci-Fi Aug.30, 2015
Defiance Canceled Syfy Alien Sci-Fi Aug.28, 2015
Proof Canceled TNT Supernatural Medical Aug.18, 2015
Atlantis Canceled BBC America Mythological Aug.1, 2015
Jonathan Strange & Mr Norrell Finished BBC America Fantasy Jul.25, 2015
The Messengers Canceled CW Supernatural Sci-Fi Jul.24, 2015
Olympus Canceled Syfy Supernatural Jul.2, 2015
The Returned (US) Canceled A&E Resurrection May 11, 2015
Forever Canceled ABC Immortal May 5, 2015
Other Space Canceled Yahoo Sci-Fi Comedy Apr.14, 2015
Helix Canceled Syfy Sci-Fi Horror Apr.10, 2015
Constantine Canceled NBC Supernatural Feb.13, 2015
Resurrection Canceled ABC Resurrection Jan.25, 2015
The Legend of Korra Finished Amazon Animated Fantasy Dec.19, 2014
Ascension Finished Syfy Sci-Fi mini-series Dec.17, 2014
Intruders Canceled BBC America Horror mini-series Oct.11, 2014
Witches of East End Canceled Lifetime Supernatural Oct.5, 2014
The Lottery Canceled Lifetime Dystopian Future Sep.28, 2014
True Blood Finished HBO Supernatural Aug.24, 2014
Crossbones Canceled NBC Pirates Aug.2, 2014
Drop Dead Diva Finished Lifetime Resurrection Jun.22, 2014
Believe Canceled NBC Super Powers Jun.15, 2014
In The Flesh Canceled BBC America Zombies Jun.8, 2014
Revolution Canceled NBC Post-Apocalyptic May 21, 2014
Metal Hurlant Chronicles Canceled Syfy Supernatural Sci-Fi May 19, 2014
Warehouse 13 Finished Syfy Supernatural Sci-Fi May 19, 2014
Star-Crossed Canceled CW Alien Sci-Fi May 12, 2014
The Tomorrow People Canceled CW Super Heroes May 5, 2014
The Neighbors Canceled ABC Comedy Sci-Fi Apr.11, 2014
Being Human (US version) Finished Syfy Supernatural Apr.7, 2014
Once Upon a Time in Wonderland Finished ABC Modern Fantasy Apr.3, 2014
Intelligence Canceled CBS Cyborg Mar.31, 2014
Star Wars: Clone Wars Finished Netflix Animated Sci-Fi Mar.7, 2014
Almost Human Canceled Fox Android Cop Mar.3, 2014
Ravenswood Canceled ABC Family Supernatural Feb.4, 2014
Dracula Canceled NBC Vampires Jan.24, 2014
Misfits Finished Hulu Super Heroes Dec.11, 2013
The Almighty Johnsons Finished Syfy Norse Gods Sep.26, 2013
Do No Harm Canceled NBC Horror (Jekyll/Hyde) Sep.7, 2013
Futurama Canceled Comedy Central Animated Sci-Fi Sep.4, 2013
Primeval: New World Canceled Syfy Sci-Fi Aug.10, 2013
Zero Hour Canceled ABC Supernatural Conspiracy Aug.3, 2013
666 Park Ave Canceled ABC Supernatural Jul.13, 2013
Save Me Canceled NBC Supernatural Jun.13, 2013
Merlin Finished Syfy Fantasy May 31, 2013
Touch Canceled Fox Super Powers May 10, 2013
Spartacus Finished Starz Gladiator Apr.12, 2013
Being Human (UK version) Finished BBC America Supernatural Mar.10, 2013
TRON: Uprising Canceled Disney XD Animated Sci-Fi Jan.28, 2013
Fringe Finished Fox Sci-Fi Jan.18, 2013
Mockingbird Lane Canceled NBC Supernatural Oct.26, 2012
Alphas Canceled Syfy Super Heroes Oct.22, 2012
Sinbad Canceled Syfy Adventure Sep.23, 2012
Eureka Finished Syfy Sci-Fi Comedy Jul.16, 2012
Bedlam Canceled BBC America Supernatural Jul.11, 2012
Awake Canceled NBC Supernatural May 24, 2012
Secret Circle Canceled CW Supernatural May 10, 2012
Alcatraz Canceled Fox Sci-Fi Mar.26, 2012
The River Canceled ABC Supernatural Mar.20, 2012
A Gifted Man Canceled CBS Supernatural Mar.2, 2012
Chuck Finished NBC Sci-Fi Comedy Jan.27, 2012
Todd and the Book of Pure Evil Canceled Fearnet Supernatural Jan.26, 2012
Sanctuary Canceled Syfy Supernatural Dec.30, 2011
Terra Nova Canceled Fox Sci-Fi Dec.19, 2011
Being Erica Finished SoapNet Supernatural Dec.12, 2011
Death Valley Canceled MTV Supernatural Comedy Nov.21, 2011
The Fades Canceled BBC America Supernatural Oct.26, 2011
Torchwood Finished Starz Sci-Fi Sep.9, 2011
Nine Lives of Chloe King Canceled ABC Family Supernatural Aug.16, 2011
Primeval Finished BBC America Sci-Fi Jun.28, 2011
Camelot Canceled Starz Fantasy Jun.10, 2011
The Event Canceled NBC Sci-Fi May 23, 2011
Smallville Finished CW Super Heroes May 13, 2011
Stargate Universe Canceled Syfy Sci-Fi May 9, 2011
No Ordinary Family Canceled ABC Super Heroes Apr.5, 2011
V Canceled ABC Sci-Fi Mar.15, 2011
Outcasts Canceled BBC America Sci-Fi Mar.13, 2011
The Cape Canceled NBC Super Hero Mar.11, 2011
Medium Finished CBS Ghosts Jan.21, 2011
Caprica Canceled Syfy Sci-Fi Jan.4, 2011
Tower Prep Canceled Cartoon Network Super Heroes Dec.28, 2010
The Gates Canceled ABC Supernatural Sep.19, 2010
Persons Unknown Canceled NBC Sci-Fi Aug.28, 2010
K-9 Canceled Syfy Sci-Fi Jul.5, 2010
Past Life Canceled Fox Supernatural Jun.18, 2010
FlashForward Canceled ABC Sci-Fi May 27, 2010
Lost Finished ABC Supernatural May 23, 2010
Legend of the Seeker Canceled syndicated Fantasy May 22, 2010
Ghost Whisperer Finished CBS Ghosts May 21, 2010
Survivors Canceled BBC America Alternate Reality Feb.23, 2010
Eastwick Canceled ABC Supernatural Feb.14, 2010
Heroes Canceled NBC Super Heroes Feb.8, 2010
Dollhouse Canceled Fox Sci-Fi Jan.29, 2010
Defying Gravity Canceled ABC Sci-Fi Oct.23, 2009
Battlestar Galactica Finished Syfy Sci-Fi Mar.20, 2009
Demons Canceled BBC America Supernatural Feb.7, 2009