Someone let Garth Ennis create a Spider-Man villain once…
Season Two, Episode Nine
Donna sees how much a single left turn could have changed everything.
In which Lisa and Marge have a dispute that lasts years.
Season Three, Episode Six
The Doctor is trapped with a lot of scared people on a stranded sightseeing train.
Kira and Bashir find themselves in an alternate reality.
Picard is taken by unknown forces, with a double taking his place on the Enterprise!
Season Two, Episode Eight