Trivia: The Simpsons holds the record for most guest stars; it is also the only non-variety show to have had appearances from three former Beatles (Paul, George and Ringo).
Kara
Trivia: Matthew Perry's wit is so legendary that the scriptwriters have often incorporated his gags into the show.
Trivia: Frank dresses up as Frankenstein in this episode for an in-joke alluding to the role he played in 1974's Young Frankenstein.
The Holographic Excitation - S6-E5
Trivia: In this episode, Sheldon and Amy are trying to decide on couples' themed Halloween costumes. Sheldon is standing in front of the dry erase board. There are 2 columns written on the board. One named "Couples I Like" and the other "Couples You Like." Under the "Couples You Like" column, one of the couples is Blossom and Joey. Blossom is the name of the television character played by Mayim Bialik in the 90s and Joey was one of her brothers.
Trivia: It's in this episode that the Heimlich Maneuver is used for the first time by the paramedics. At the USC game, when a guy is choking on a hot dog, John and Roy are called, and John uses the Heimlich. Up until season 6 we've seen the guys use other methods, such as the ChokeSaver which look like huge white tweezers, to remove obstructions in an airway, as seen in 4x9, "Foreign Trade."
Super Grover
Band Candy - S3-E6
Trivia: The accent that Giles uses as his teenage self is Anthony Head's natural accent.
Cubs Fan
Trivia: John Mahoney plays Kelsey Grammer's father in the series, even though in real life he's only 15 years older than Grammer.
Trivia: Gene Roddenberry created the transporter as an easier (and cheaper) way of getting Enterprise crew members onto a planet's surface, rather than landing the ship on the planet.
Trivia: Although Len Cariou plays Tom Selleck's father, he's only five years older than Selleck.
Trivia: Ben Sullivan, Dr. Cox's best friend and brother-in-law, loves his camera and takes pictures everywhere he goes. Brendan Fraser, who plays Ben, has a great interest for photography in real life.
Trivia: Katie Holmes is the only actor/actress who appears in every episode
One Henry, Three Girls: Part 1 - S2-E2
Trivia: When Kid Danger and Veronica are about to kiss in the park, the old man who stop them is holding a book called "Good Burger." The show's writer, Dan Scheider also wrote for the show Good Burger.
Bishop73
Health Care - S1-E3
Trivia: Creed Bratton plays the voice of the Industrial Coal Mine Shaft employee that Michael talks to on the phone when he's trying to come up with some surprise for the staff. (00:12:15)
Goodbye (1) - S2-E4
Trivia: The first episode to air following John Ritter's death, it was filmed without a laugh track or live studio audience.
Cubs Fan
The House Meets the Mouse (1) - S6-E23
Trivia: In Disney Land, D.J. thinks that many different Disney characters are Steve, including Aladdin, a character that Scott Weinger, the actor who played Steve, voiced.
The Mainland - S3-E4
Trivia: When Father Ted sees actor Richard Wilson from the hit TV series "One Foot In The Grave", Father Ted goes up behind Richard and says "I don't believe it." causing Richard to attack him. Richard Wilson has admitted that he really does hate when people come up to him and says his character's well known phrase.