Trivia: Author Tess Gerritsen, creator of the series of novels upon which the TV series is based, appears as an author at the mystery writer convention.
The Karate Kid Returns - S6-E14
Trivia: At the end of the episode when Jill is asking to sing with the Beach Boys, Wilson's entire face is visible for a split-second (for those unfamiliar with the show, one of its running gags is that Wilson's face is always partially obscured, usually the lower half). (00:21:10)
The Sponge Who Could Fly (aka The Lost Episode) - S3-E16
Trivia: The miner who gives Patchy the video tape is Stephen Hillenburg, the creator of SpongeBob SquarePants. (00:04:53)
Trivia: An R2-D2 with a wig is visible on Junior's shelf. A nod to Cleveland playing R2-D2 in the Family Guy Star Wars trilogy.
Trivia: When Bill and Ben find Boco, there's a soup can on the left of the screen, dressed to be part of the set like a large oil drum or similar.
Trivia: D.J. throws a life buoy onto a man which says SS Papouli on it. In Full House, Danny buys a boat and names it this in memory of the family's beloved Papouli.
Trivia: One of the severed heads on a spike is that of former president George W. Bush. Before shooting the scene, George RR Martin asked writers and producers David Benioff and D.B.Weis to have a cast of their 3 heads to be put on the spikes, but for budget reasons they opted to get a box from HBO's warehouse with used severed heads. They noted that one was Bush's, but they put a wig on it and got away with nobody noticing. In the Blu-Ray commentary the producers revealed the story, and got a lot of criticism from the right.
Indifference - S4-E4
Trivia: When Michonne and Daryl are walking toward the gas station sign, above the word diesel it spells out HELL in upside down numbers. (00:08:59)
The Red Sea Sharks: Part 1 - S3-E1
Trivia: The Emir's hideout is strongly based on the Al-Khazneh temple at Petra. (00:19:25)
Trivia: In this episode the director, Bryan Singer, makes a cameo as the director of the sports documentary Hank Wiggen is starring in.
Trivia: The man that Ms. Gordon, Parole Officer mistakes for Magnum, and that later he admits "sort of look alike" is Tom Lupo, a stunt coordinator and most importantly Tom Selleck's stunt double for this very series. (00:22:35)
Trivia: Columbo's first name is never mentioned throughout the series. However in a few episodes, such as "Dead Weight", "A Matter of Honor" and "Death Hits the Jackpot" he flashes his badge and the name "Frank" can clearly be seen.
Dad's Dead - S1-E2
Trivia: When Ken appears at the end of the episode and Tommy wets his pants, David Shatraw actually had relieved himself. The studio audience wasn't aware of it until he pulled his tie aside to look down at his slacks. (00:20:55)
Trivia: Stephen King has a cameo as the old man asking for coffee. (00:34:35)
Trivia: Walter Jones (Zack the Black Ranger) is missing his left middle finger. If you look closely you'll see it missing at various times throughout the show. Particularly when he morphs (he's the only one that only has three fingers on top of the morpher).
The Guardian - S1-E5
Trivia: Stan Lee makes a cameo describing the Division's operative as being like a superhero. (00:07:00)
Trivia: The 'dialysis machine' which Molly obtains from the GSC to use on her son is actually an Apple AirPort Extreme Wireless Router turned upside-down. (00:32:00)
Trivia: As we see throughout the series, the demon Crowley's prized motorcar is a 1934 Bentley that he has owned and driven since it was new. The choice of this vehicle for the show was a deliberate departure from the original novel, in which Crowley drove a 1926 Bentley. As it turns out, neither Terry Pratchett nor Neil Gaiman knew anything about vintage cars when they co-authored "Good Omens"; in ignorance of the car's actual appearance, they arbitrarily chose a 1926 Bentley for The Book. During production of this TV series, however, when Neil Gaiman at last saw a 1926 Bentley, he realised that it was not at all the motorcar he and Pratchett had envisioned. Upon reviewing photos of many vintage Bentleys, Gaiman finally chose the 1934 model (as it more closely matched the "intended look" of Crowley's car) for the TV series.