Trivia: In one of the first episodes of the second season, Brooke is talking to Peyton about Lucas, and she says "love triangles are so last season". In the first season, Brooke, Peyton, and Lucas were in a love triangle.
Crossroads - S1-E5
Trivia: In the scene where the Red Devils toast the 101st Airborne, when the camera shows the assembled soldiers you'll see Tom Hanks as one of the Red Devils in a beret at the back left (5 or 6 men in) with his right hand on his hip. His head moves forwards to become obscured behind another soldier. (00:30:30)
Forever Red - S1-E34
Trivia: This episode featured an appearance by every Red Ranger, with the exception of Steve Cardenas, who played Rocky in series 2, 3, and 4.
Winning a Battle, Losing the War - S1-E3
Trivia: Several times in this episode, jokes are made about the residents thinking George is gay. Isaiah Washington was later fired for making homophobic remarks about T.R. Knight.
Trivia: The theme tune heard for the show "Capital Beat" is actually the theme music for the UK's "News at Ten" on ITV.
Trivia: Danno was played by Tim O'Kelley in the 5-0 pilot. But a NY test audience told CBS they didn't buy him as a serious cop because he was too much of a "smart-cracking, Jimmy-Olsen-type gee-whiz kid." Leonard Freeman took the criticism to heart, and recast the part with James MacArthur for the series.
Trivia: The actress playing Jane, Susannah Harker, was quite heavily pregnant during the filming of the movie. This can be seen quite obviously in some scenes.
Trivia: Rain Robinson has a model of a DY-100 on the window sill in her office. In 1996 (also the year this episode is set), Kahn left Earth in the SS Botany Bay, a DY-100 class starship.
Trivia: In one episode, Aaron Echolls mentions that he was voted People magazine's Sexiest Man Alive in 1987. Harry Hamlin, who plays Aaron, actually did earn that honor that year.
Trivia: The show featured the first toilet flush heard on TV.
Trivia: The original actor who had been cast as Charlie had a drinking problem, and couldn't deliver his lines properly. John Forsythe got called up by creator Aaron Spelling after midnight on a Friday night and was asked to record lines ASAP because the show had to be aired Monday night. He headed straight down to the studio at 20th Century Fox, still in his slippers and pyjamas, recorded the lines and went straight back to bed.
Trivia: When Logan is on his computer and a girl stumbles into his room, when he turns around, it reveals which website he was on: iCarly.com.
Trivia: Craig says that Manny reminded him of his 5 year old step sister, Angela. In real life Manny and Angela are sisters (Cassie and Alexa Steele).
Trivia: Linda Hamilton was pregnant during production and wanted to be written out of the show so her character Catherine was killed off at the end of Season 2. This caused ratings to drop and the show was cancelled halfway into Season 3.
The Arrival - S1-E4
Trivia: Michael Cerveris makes his first significant appearance in this episode as The Observer/Bald Man. However if you watch the series from the beginning, he makes fleeting appearances in every episode, sometimes on a tv screen.
Trivia: The Dollhouse is run by the Rossum Corporation. The word Robot was first used in a 1920s science fiction stage play about mechanical servants called Rossums Universal Robots.
Trivia: The Widow Twanky was portrayed by Michael Hurst although he would be credited as Edith Sidebottom.
Crisis on Earth-X, Part 3 - S4-E8
Trivia: Supergirl says to her doppelganger "General, can you step outside." That line was said by Superman in Superman II.
Trivia: Robert Forster filmed his scene in this episode at the same time that he filmed his scene in El Camino. He is having a phone conversation with Bob Odenkirk, but Odenkirk shot his part later. Unfortunately, Forster passed months earlier (coincidentally on El Camino's release date) and sadly never got to see his work in neither this nor El Camino.