Television episodes about parallel universes

episode of Doctor Who (S2 E5)

episode of The Simpsons (S7 E6)

episode of Doctor Who (S2 E6)

episode of Doctor Who (S2 E13)

Arrowverse crossover event

episode of Doctor Who (S2 E12)

27th episode of the first season of Star Trek: The Original Series

"Spookyfish" is the fifteenth episode of the second season of the American animated television series South Park. The 28th episode of the series overall, it originally aired on Comedy Central in the United States on October 28, 1998. The episode was written and directed by series co-creator Trey Parker. In the episode, Aunt Flo comes to stay, but her goldfish she bought for Stan Marsh turns out to be evil. Also, "Cartman" grows a beard and starts acting strangely nice and agreeable. It was the season's Halloween special, featuring the "spooky" theme of having pictures of Barbra Streisand in th

episode of Doctor Who (S4 E11)

episode of The Simpsons (S29 E4)

episode of The Simpsons (S25 E20)

Abra-Catastrophe! is a television film initially released as the seventh, eighth, and ninth episodes of the third season of The Fairly OddParents, serving as the first special of the show. It was originally broadcast on Nickelodeon in the United States on July 12, 2003.

Arrowverse crossover event

episode of Doctor Who (S11 E9)

episode of Rick and Morty (S1 E6)

2012 film by Chris Graham

three-part crossover between Arrow, The Flash, and Legends of Tomorrow

four-part crossover between Supergirl, Arrow, The Flash, and Legends of Tomorrow

serial of the seventh season of the British science fiction television series Doctor Who

episode of Rick and Morty (S1 E8)

episode of Star Trek: The Next Generation (S7 E11)

21st episode of the first season of The Twilight Zone

episode of animated television series The Simpsons (S32 E4)

episode of The X-Files (S9 E4)

23rd episode of the first season of The Twilight Zone

episode of Family Guy (S8 E1)

episode of Buffy the Vampire Slayer (S3 E9)