Season 1 of Through the Keyhole premiered on 1987-04-03.

Season 2 of Through the Keyhole premiered on 1988-04-15.

Season 3 of Through the Keyhole premiered on 1989-02-17.

Season 4 of Through the Keyhole premiered on 1990-03-09.

Season 5 of Through the Keyhole premiered on 1991-04-05.

Season 6 of Through the Keyhole premiered on 1992-05-08.

Season 7 of Through the Keyhole premiered on 1993-05-14.

Season 8 of Through the Keyhole premiered on 1994-04-10.

Season 9 of Through the Keyhole premiered on 1996-02-22.

Season 10 of Through the Keyhole premiered on 1997-04-07.

Season 14 of Through the Keyhole premiered on 2001-05-14.

Season 16 of Through the Keyhole premiered on 2003-03-03.

Season 18 of Through the Keyhole premiered on 2006-02-27.

Season 19 of Through the Keyhole premiered on 2007-03-26.

Season 20 of Through the Keyhole premiered on 2008-05-06.