Smallville (2001)

Crusade - S4-E1

Trivia: Martha makes a remark suggesting she thinks Bridgette Crosby and Dr Swan are together to which Bridgette comments "In another lifetime." Bridgette is played by Margot Kidder, who played the original Lois Lane, Prof Swan was played by the late Christopher Reeve. A nice touch I think.

Pariah - S4-E12

Trivia: At the end, when Clark is visiting Alicia's grave, there is another grave shown with the name Allison Dunn on it, which is the name of Smallville's set decorator.

Ageless - S4-E20

Trivia: The names of the students who RSVP'd to the party are names of people who worked on the show in some form, with the exception of the two characters in the episode, Karen and Tanner. Even the host of the party, Christina Verano, worked on the show.

Bishop73

Ageless - S4-E20

Trivia: When looking at Karen in the yearbook, the other person on the page is listed as Jacquie Gould. Gould is a Canadian director out of Vancouver, where a lot of the show was filmed. She's credited as first assistant director for one episode.

Bishop73

Spirit - S4-E18

Trivia: When Dawn is looking through the yearbook, some of the names seen are people who worked on "Smallville." Mairzee Almas was one of the directors who would go on to direct Kreuk (Lana) in "Beauty and the Beast" and a few other DC shows. Assistant editor Anthony Ashley, assistant directors Jen Carpenter and Rob Duncan, costume designer Caroline Cranstoun, and location manager Michael Hauka. Many would also go on to work on other DC shows.

Bishop73

Gone - S4-E2

Trivia: The Daily Planet article about Lionel Luther being found guilty was reported by Perry White. When Perry was seen in season 3, he was a disgraced reporter, after Lionel got him fired, who worked as a tabloid reporter. He vowed to get sober and get his career on track at the end of the episode "Perry." He isn't physically seen again until the end of season 9.

Bishop73