Tommy Chong was only in BBC sitcoms.
Thomas B. Kin Chong -LRB- born May 24 , 1938 -RRB- is a Canadian-American comedian and actor , who is known for his marijuana-themed Cheech & Chong comedy albums and movies with Cheech Marin , as well as playing the character Leo on Fox 's That '70s Show .	marijuana	Cannabis (drug)	Cheech & Chong	Cheech & Chong	Cheech Marin	Cheech Marin	Leo	Leo (That '70s Show)	Fox	Fox Broadcasting Company	That '70s Show	That '70s Show
That '70s Show is an American television period sitcom that originally aired on Fox from August 23 , 1998 , to May 18 , 2006 .	sitcom	sitcom	Fox	Fox Broadcasting Company	period	Period piece
