Three’s Company is a TV series that aired on ABC from March 15, 1977 to September 18, 1984 for eight seasons. It is based on the British sitcom Man About the House.

Cast & Character Origins

Characters	From	Date	Episode
Jack Tripper, Christmas “Chrissy” Snow, Janet Wood, Stanley Roper, Helen Roper, Larry Dallas	Man About the House	15 August 1973	S01E01: “Three’s a Crowd!”

(Note: The British show had a similar premise but the names were changed for the American version. The other spinoffs of Man about the House, those being George and Mildred and Robin’s Nest, were also adapted for America into The Ropers and Three’s a Crowd, respectively.)

Outgoing Crossovers

Characters	Guest On	Date	Episode	Crossover Type
Larry Dallas	The Ropers	April 17, 1979	S01E06: “Opportunity Knocks”	A
Jack Tripper, Christmas “Chrissy” Snow, Janet Wood	The Ropers	September 15, 1979	S02E01: “The Party”	A
Larry Dallas, “Greedy” Gretchen Wexler	Three’s a Crowd	February 19, 1985	S01E18: "Deeds of Trust"	A
Stanley Roper	Ellen	October 8, 1997	S05E03: “Roomates”	A*

(Note: Norman Fell’s appearance as Mr. Roper in Ellen is not credited and does not have any lines. There is Three’s Company style music playing and he is having a wacky misunderstanding about a straight person being gay.)

Spinoffs & Outgoing Cast

Characters	New Show	Date	Episode
Stanley Roper, Helen Roper	The Ropers	March 13, 1979	S01E01: “Moving On”
Jack Tripper, Vicky Bradford, James Bradford	Three’s a Crowd	September 25, 1984	S01E01: "Family Affair”