Trivia: Beverly Owen played the part of Marilyn for thirteen episodes believing the show would flop. When The Munsters became a hit, she started crying because of being away from her boyfriend who lived in New York. She was let go and the part of Marilyn went to Pat Priest who had such an uncanny resemblance to Beverly that people watching the show never knew the difference.
Visitors From Beyond the Stars - S1-E18
Trivia: The Time Tunnel Homing Beacon used in "The Revenge of Robin Hood" episode is hanging on the bulkhead by the door of the aliens' spaceship.
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 character of Michael Evans was named after co-creator Michael Evans. The real Michael Evans was the original Lionel on "The Jeffersons".
Trivia: The living room of the TV show "Dat's What I Was Tellin' You Before" Roberta was watching in the cutaway is the same living room as the Smith house has in American Dad. Another cartoon created by Seth MacFarlane just like this one. (00:09:40)
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: Kimberly's school is the same school from the Facts of Life. It even has the same classmates and Kimberly shows up sometimes.
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.
Trivia: Across the hall from Nelson and Murdock is an office that reads "Atlas Investments", a nod to the comic company (Atlas Comics) that would later become Marvel. The logo is the same as that of Atlas Comics too.
Trivia: A "Penny Dreadful" was one of several terms used to describe cheap horror comic books that were popular among the lower economic classes of Victorian England.
Trivia: Nate's dad, played by Thomas F. Wilson, says "let's make like a tree and leave", to which Nate replies "I'm not sure that's how it goes." Thomas F. Wilson famously played Biff in the Back to the Future films, who frequently got that saying wrong.
Trivia: While reading the Anhkana, Ed compares its gruesome contents to writing by Bret Easton Ellis. Ellis is famous for having written the graphically violent novels on which American Psycho and its sequel The Rules of Attraction are based.
Trivia: Despite the series being a critical darling and winning a number of prestigious awards, it was quietly cancelled during its third season in 2011, and network Showtime never gave a reason why the plug was pulled. Star Toni Collette has stated as recently as 2017 that she was still frustrated that the show had been cancelled, as she loved the series and the cast and thought it would have gone on at least a few more seasons.
Trivia: Dexter's alias throughout the series is Jim Lindsay. The surname Lindsay is most likely in homage to Jeff Lindsay, the author of the Dexter series of novels.