Trivia: Although many realistic freeway numbers and exits mentioned over the 2-way radio are real, they were not used in the show. An unused section of the 210 freeway (close to the 118 freeway) in the San Fernando Valley that wasn't quite open to the public yet, was the location nearly always shown on the show representing whatever location is mentioned. If you see many episodes, you can see the same section of freeway always shown.
Trivia: Elsbeth suspects that a "suicide" is actually a murder because the victim had recently used teeth whitening strips. This is similar to the last Columbo episode, "Columbo Likes the Nightlife", where the "suicide" victim has recently used mouthwash and trimmed his toenails. In each case they didn't believe a person would do those things right before taking his or her own life. Elsbeth also often turns around with "just one more thing" after walking away, just as Columbo often did.
Rolling Thunder Cannon Punch - S1-E3
Trivia: The white jacket worn by Colleen resembles her outfit in the "heroes for hire" comic series.
Trivia: This was the first US TV series ever to resolve its story line and air a definitive ending, despite network objections that doing so could harm its syndication revenue. The 2-hour finale, "The Judgment," garnered the highest TV ratings ever up to that time, a record it held for many years afterward.
Trivia: Bert Cohen was paged on the intercom in the Desert Inn more than any other name heard in the whole series. In second place was Monty Levine and third was Thomas Shefsky.
Trivia: One of the girls in Wayne's Missing Children's files is Annie, Clayface's split-off clone from The New Batman Adventures episode "Growing Pains".
Trivia: Instead of the Royal Air Force, the series has a fictitious British Air Force with largely invented insignia. Ranks are taken from the RAF, but sometimes different rank insignia is worn (e.g. an air vice-marshal wearing air marshal's insignia and a flight lieutenant wearing flying officer's insignia, although another flight lieutenant wears correct insignia).
Trivia: Except for the first episode, where Laura drinks a glass of wine in 2 gulps, she never takes a sip of her drinks - wine, apple juice, nothing - except for tea. She pretends to drink, but doesn't succeed.
The Hustlers News of the Day - S3-E5
Trivia: In some versions of this episode the name of the newspaper the grifters con has been rather clumsily dubbed over as "The Weekend World" rather than the original "The Sunday World", which is a real newspaper.
Trivia: Actor Balthazar Getty is the son of the subject of this series, John Paul Getty III.
Flight Risk - S2-E4
Trivia: In this episode, Dan Cooper hijacks and robs the passengers, then jumps out of the plane mid-flight with over $1 million of goods. In 1971, a man identifying himself as "Dan Cooper" (later misidentified by the media as "D.B. Cooper", which ended up being the more popularised epithet) hijacked a plane and jumped out of the plane in mid-flight with over $200K (equivalent to over $1 million in 2017).
Trivia: As Frank is running up the stairs in the FBI, just before he meets Peter you can see "Mulder and Scully" walking down the stair case - this is in fact David Duchovny and Gillian Anderson's stand-ins, but they do look a lot like them.
Trivia: Lieutenant Decker is the same Decker from The A-Team TV show.
Trivia: In this episode, the murder victim's name is given as Reiko Hashimoto, and at one point, Gannon shows Friday a couple of photographs of her. Reiko Hashimoto was the maiden name of Reiko Douglas, the wife of comedy writer, author, and perennial talk show guest Jack Douglas, and the photographs used are of her.