Which TV series have you watched every episode of?

Big Mouth, Trailor Park Boys, Stranger Things, Family Guy, American Dad

Dexter, it was a great TV show but a bad ending though.

Bates Motel & American horror story

Too many to name them all off.
Here are a few I guess...
Prison break, Community, That 70s show, Brooklyn Nine Nine, etc.

Columbo, Rome, A-Team, MacGyver and maybe the Fall Guy.

Roseanne.......

Supernatural, Sex and the City.

Babylon 5.
I love Star Trek and Doctor Who, all that nerd stuff, but I can't say that I have seen every episode of those shows. There are a lot of them. Some original Trek episodes were so bad I couldn't complete watching them. And there are so many 20th century Doctor Who episodes that I have not seen them all.
But Babylon 5... a friend of mine put me on to that show in the 90s... and its an all-time favorite for me.
There are 5 seasons of that show. Season 1 is pretty uneven and shaky, and season 5 is kinda annoying at points... but seasons 2, 3 and 4 of Babylon 5 are so amazingly good, no sci-fi-fan should ever miss out on seeing it.

Downton Abbey
Resurrection Ertugrul
Sons of Anarchy

Friends
The X Files
Daredevil
Jessica Jones
Luke Cage
Iron Fist
Breaking Bad
Stranger Things
Game of Thrones
Westworld
Battlestar Galactica

The Three Stooges, nyuk nyuk nyuk

i have seen all the episodes of office, legacies and supernatural and many more. the only one i might not have seen is fairly odd parents

Star Trek
All in the Family
Law & Order: Criminal Intent
Grays Anatomy

All of of the Scooby-Doo series

the only one i watched every episode of is of Supernatural and its hella a lot

Breaking Bad / stranger things

Family Guy and The Big Bang Theory 

Quite a large number. I wouldn't remember them all.
For instance: Star Trek TOS, TNG, TAS, DS9 and VOY. Also Sex and the City, McGyver, Mork & Mindy, ALF, Orion, Gemini Man, Logan's Run, Brady Bunch, Voyage to the Bottom of the Sea, Lost in Space, SeaQuest, Andromeda, Battlestar Galactica, Time Tunnel, V, Stingray, Fireball XL5, Supercar, Joe90, UFO, Captain Scarlet, Thunderbirds, Space 1999.   

Knight Rider
The A Team
The X Files

Breaking Bad, Seinfeld, Mad Men, Dexter, I Love Lucy as well as Ozark and Fleabag (Netflix and Amazon, respectively).

The Big Bang Theory’s probably the one that I’ve rewatched every episode the most. I know it’s hated by many but for me it’s just something I’ve watched since I was a kid so I have a soft spot :)

Star Trek and Dr Who...........

Perry Mason, MASH, Columbo

Every episode? The latest was Neon Genesis Evangelion.

I'd like to say MythBusters also, but I don't know if I've seen EVERY single one.

For sure, Avatar: the Last Airbender, and The Legend of Korra after years of refusing to see it. Also, every pre-movie episode of SpongeBob many times…

Oh, and Mad-Bull 34, a long time ago…

I'm sure there's more, but that's what comes to mind.

Are you talking about new shows??? TV sucks! There is nothing to watch on TV nowadays. I cancelled all my cable movie channels like HBO and Showtime because they were too bloody expensive and all the movies and TV shows suck! I still have AmazonPrime and Netflix, but their movies and TV shows suck too! So very boring!

Probably none.......................

friends
full house

Star Wars The Clone Wars, Star Wars Rebels, Star Trek Voyager, Star Trek The Next Generation and Star Trek Deep Space Nine.

awkward and the secret life of the american teenager

Lady-Boys of Bangkok...……..
oh yes
oh yes

The original Star Trek.

Startrek generations Captain Picard. and StarTrek voyager. Captain Janeway.

Startrek .

Heroes, Prison Break, The Mighty Boosh

Desperate Housewives.

probably 'friends' and 'inspector morse' not to forget 'prime suspect' and new york? psychiatrist co starring his 'father' - google not found and way off beam.

Star Trek The Next Generation, Deep Space Nine  and Voyager.
Torchwood and many comedies.

Spooks, Drama about MI5,
Person Of Interest, Spy tech drama,
Loved both these shows, Never missed an episode.

Have gun will travel.

There have been about 5 but I'll just say MOM.