Come and Knock on Our Door: The Three's Company Quiz

Knowing the Ropers would never approve of a man living with two women, the girls tell their landlords that Jack is gay so they will give their approval for Jack to move in.

John Ritter played the clumsy, lovable ladies man Jack Tripper on "Three's Company."

Jack is initially in culinary school. He goes on to be a chef -- first at Angelino's and then at his own restaurant, Jack's Bistro.

The lighthearted comedy is set on the sunny shores of Santa Monica, California, within walking distance to the beach.

Janet works at the Arcade Flower Shop and eventually becomes the store manager.

Chrissy -- played by Suzanne Somers -- reveals that her real name is Christmas Snow, because she was born in December.

Chrissy's spot in the apartment is taken over by her cousin Cindy Snow, played by Jenilee Harrison. Cindy not only takes over Chrissy's place in the apartment but also takes over her old secretarial job.

After Cindy leaves the apartment, nurse Terri Alden, played by Priscilla Barnes, moves in for the final three seasons.

Jack's best friend Larry Dallas -- played by Richard Kline -- is a lady-loving used car salesman who lives in the apartment upstairs from Jack and the girls.

The Ropers sell the building to Bart Furley, who has his brother Ralph take on the role of building manager. Don Knotts plays the "macho man" Mr. Furley.

Wedgeworth played Lana Shields, who spent most her time pursuing Jack while ignoring Mr. Furley's amorous advances.

Jack and the girls like to head down to their favorite pub, the Regal Beagle to unwind, have a drink, or meet a date.

Jack's Uncle Fremont has a habit of writing bad checks and gets Jack and his roommates in big trouble when he writes a check to Mr. Roper.

After Janet scores a pair of Frank Sinatra tickets, Chrissy and Jack fight over who gets to attend the show. Janet finally resolves the problem by giving the tickets to the Ropers.

Worried that the FBI is coming to drag him back to the Navy, Jack dresses as Chrissy to avoid them. Eventually, he learns that they only wanted him to provide a character reference for an old friend.

To score a date with Mr. Furley's niece without breaking his "gay" cover, Jack pretends to have a twin brother named Austin.

Cindy still made appearances on the show after Terri moved into the apartment, including a spot as a temporary housekeeper for Jack and the girls during Season 6.

Legendary comedian Lucille Ball took on the hosting duties for "The Best of Three's Company" retrospective, which aired during the show's sixth season.

Jack hides the money in the couch, not knowing that Mr. Furley plans to replace the old sofa that very same day.

After a night out with his old Navy buddies, Jack gets a tattoo on his backside. When he tries to have it removed in secret, Mr. Furley suspects he's having a sex change operation.

In the final season of the show, Janet marries art collector Phillip Dawson.

In the final episode of the show, Terri quits her job as a nurse and moves across the Pacific to settle in Hawaii.

The series ends with Jack appearing to finally settle down. He moves in with girlfriend Vicky then discovers that her father is their new landlord.

"Three's Company" was largely based on a popular British sitcom called "Man About the House," which ran from 1973 to 1976.

The show ran for 174 episodes over eight seasons, from 1976 to 1984.

"Three's Company" inspired two spin-offs, including "The Ropers" and "Three's a Crowd."

"The Ropers," which focused on the couple after they moved to Cheviot Hills to manage an apartment building, starred Norman Fell and Audra Lindley and ran for two seasons from 1979 to 1980.

"Three's a Crowd" premiered just a week after "Three's Company" ended and focused on Jack and his new life without his roommates. The show lasted only a single season.

In "Three's a Crowd," Jack and Vicky are living together in an apartment over Jack's restaurant.