"The City on the Edge of Forever" is the penultimate episode of the first season of Star Trek. It is episode #28, production #28, first broadcast on April 6, 1967. It was repeated on August 31, 1967 and marked the last time NBC aired the series on Thursday nights. It was one of the most critically acclaimed episodes of the series and was awarded the 1968 Hugo Award for Best Dramatic Presentation. The teleplay is credited to Harlan Ellison, but was controversially rewritten by several hands before filming. It was directed by Joseph Pevney. It guest-stars Joan Collins as Edith Keeler. Overview: The crew of the Enterprise discovers a portal through space and time, which leads to McCoy accidentally altering history.
"City on the Edge of Forever" (known as Flashbacks on the DVD) is the 20th episode of Comedy Central's animated series South Park. It originally aired on June 17, 1998. The episode's title is taken from the Star Trek episode, The City on the Edge of Forever. It parodies clip shows, program episodes consisting mainly of flashbacks from earlier episodes.
