In the first episode of the 2003 Battlestar Galactica mini-series, Serenity from Firefly can be seen flying above the doctor’s office where Laura Roslin learns she has cancer.

BSG 2004: Actress Tricia Helfer had to have her hair constantly dyed to keep it blonde. She is naturally a darker haired blonde. She asked for a wig, but the producers refused due to cost. About a week later poor Tricia’s hair fell out due to being constantly dyed. The show was obligated to spend $10,000 to have wigs rushed to the set for her. She wore a wig throughout the rest of the series.

The USS Reliant in “Wrath of Khan” is upside down. Originally the model was designed to have the warp nacelles above the saucer section. However, due to a misunderstanding the plans were approved upside down. Honestly, I think it works better because the two ships looked very different, but were obviously from the same fleet.

We all know about Viggo breaking his toe in “The Two Towers”. But did you know that in “Fellowship of the Ring” he really did deflect a thrown dagger with his sword in the final fight scene?

Farscape 1999 was produced by the Jim Henson company, the same production company that made the muppets. Many models from the Henson’s company’s earlier productions were used in the show. Also, Lani John Tupu who played Bilar Craise also was the voice for the Pilot of Moya.

In “Fellowship of the Ring” when Gandolf confronts the Balrog, actor Ian McKellen was acting to a golf ball. On the flip side, when Sam and Frodo see Cirith Ungol after escaping Shelob’s lair, the tower was actually there on set with them. They did not have to pretend seeing it.

In the same vein of Back To The Future. When Marty goes back in the past he leaves from Twins Pines Mall. When he gets in the past he knocks down a pine tree and the farmer yells, you killed one of my pines.

When Marty gets back to the present it is now called Lone Pine Mall.

Dr Hannibal Lecter said he ate liver, fava beans, and Chianti, because those are all foods you can’t eat when taking MAOI antidepressants, he was saying he wasn’t taking his meds.

The whole of the TV show ‘Lost’ took place in the mind of a goose.

In “Soldier" (1998) there’s a reference to “Blade Runner.” The main character is shown to have participated in several battles, including the Battle at Tannhauser Gate, which is a direct reference to a line from “Blade Runner.” I feel like no one knows about this movie but me.

Jack Black was in the movie ‘Waterworld’. It’s before he was a big name, so he isn’t given any special camera treatment as one of the raiders.

The alien queen in ‘Alien: Resurrection’ is the same prop as in ‘Aliens’. A fan had bought and stored the prop for years and loaned it back to the studio for filming.

A couple ones from The Matrix I found interesting:

We first meet Neo in room 101 (his apartment) and Trinity in room 303.

Toward the end of the film when Neo is running from agent Smith, he runs past a TV showing a scene from The Prisoner, a 1960s sci-fi show that was partly the inspiration for the movie.

This man in Monty Python’s Life of Brian is none other than British comedy legend Spike Milligan, who, together with Peter Sellers and Harry Secombe, starred in the 1950s radio comedy show “The Goon Show”, which all members of the Pythons cited as their most important influence.

By coincidence Milligan was visiting his old World War II battlefields in Tunisia where the film was being made. The Pythons were alerted to this and he was included in the scene being filmed that morning.

On the original DVD for Bring it On, there’s an easter egg in the menu somewhere.

The Easter egg is a 5 second clip of the director saying “congratulations, you found the Easter egg.” That’s it.

Poltergeist II - At one point in the film Craig Nelson (aka the Dad) asks Will Sampson’s Medicine Man character if he’s escaped from a mental asylum. The way it’s played make it obviously a funny little nod to Sampson playing Chief Bromden in ‘One Flew Over the Cuckoo’s Nest’.

Who Framed Roger Rabbit? - Christopher Lloyd’s character is looking for Roger after smashing up the Trolley Depot bar and one of the drunks tells him “Yea I seen a rabbit. He’s right here. say Hello Harvey.” At which point if you’ve seen the 1950’s Jimmy Stewart comedy ‘Harvey’, about a man whose best friend is an invisible rabbit, feel free to bore anyone else who might be in earshot by explaining the joke.

In Die Hard where McClane jumps from one air vent shaft opening to another, he misses the opening he was aiming for but catches the ledge of one underneath it.

The take used was of a mishap where the stunt double fell further than intended, leading to the editor’s decision to have McClane catch a lower ledge mid-fall.

imo it makes the scene more intense and impressive (less realistic but hey, action movie logic)

the source (a Wikipedia citation, which is how I learned this bit of trivia)

The eyes of the Cryptkeeper puppet in the TV series Tales from the Crypt are the same two eyeballs that were used for Chucky, the doll from Child’s Play.

During filming of the original “The Pink Panther” (1963) movie, actor Robert Wagner was blinded.

While shooting a bubble-bath gag scene involving an industrial-strength foaming agent, the chemicals burned the skin of both Wagner and his co-star Capucine. Wagner was reportedly temporarily blinded for several weeks after being submerged in the foam, with corneal irritation so severe that he could not see clearly for a period of time.

https://www.tcm.com/articles/960953/behind-the-camera-the-pink-panther

Really, there’s a tragic litany of incidents like this going all the way back to the Nickelodeon era. Production folks sometimes screw up, leading to actors and stuntpeople getting hurt, or even killed, as with Brandon Lee in “The Crow,” or with The Twilight Zone movie, in which three actors were beheaded / fatally injured by a helicopter crash.

https://en.wikipedia.org/wiki/Twilight_Zone_accident

I Dream of Jeannie / Barbara Eden was married to Klingon Kang /Michael Ansara.

In the 2009 Star Trek Kelvinverse film, there’s a scene where the Enterprise comes out of warp directly into a debris field. For a brief moment, R2D2 can be seen floating through that debris field.