The Hunger Games return with such a sequel twist that you can't believe writer Suzanne Collins didn't think of film when writing. Catching Fire builds up with all types of subversive messaging which is interesting but also brings into relief the limitations of the genre and film.
Ep. 3 School Hard In this episode we learn that Principal Snyder and the Police are aware of the supernatural problem that plagues Sunnydale. This is foreshadowing the events of season 3.
Ep. 3 School Hard Spike's appearance in the second season was originally meant to last only few episodes, but his character was immediately loved by the fans. Because of this Joss Whedon decided to keep him in the show and he slowly became one of the major characters.
Ep. 3 School Hard Both Spike and Drusilla made their first appearance on this episode.
Ep. 4 Inca Mummy Girl Jonathan Levinson's first appearance was on this episode. He was a minor character but went on to become part of The Trio which was the "Big Bad" of season six.
Ep. 19 I Only Have Eyes for You According to the DVD commentaries by Joss Whedon, this was the episode where he saw that David Boreanaz could carry his own show.
Ep. 3 Faith, Hope & Trick This episode features the band Darling Violetta performing in the Bronze. Later Darling Violetta went on to write the theme song to Angel.
Ep. 7 Fool for Love This is a companion to the Angel season 2 episode "Darla", which originally aired later the same night on The WB network.
Ep. 0 Unaired Pilot This unaired pilot was directed and funded out of pocket by Joss Whedon. He used the episode to pitch the show to networks. Once it was picked up by the WB the pilot was reshot with Riff Regan being replaced by Alyson Hannigan as Willow and Ken Lerner replacing Stephen Tobolowsky as Principal Flutie.