with 13 episodes premiered on April 1, 1978

with 16 episodes premiered on January 18, 1979

with 17 episodes premiered on September 6, 1979

with 16 episodes premiered on September 4, 1980

with 17 episodes premiered on September 3, 1981

with 14 episodes premiered on September 4, 1982

with 15 episodes premiered on September 3, 1983

with 14 episodes premiered on September 7, 1984

with 11 episodes premiered on January 11, 1985

with 22 episodes premiered on September 6, 1985

with 22 episodes premiered on September 5, 1986

with 22 episodes premiered on September 18, 1987

with 12 episodes premiered on September 9, 1988

with 21 episodes premiered on September 7, 1989

with 14 episodes premiered on December 26, 1997

with 13 episodes premiered on June 26, 1999

with 20 episodes premiered on January 7, 2001

with 20 episodes premiered on May 4, 2002

With falling ratings and the last episodes shelved by ITV, the series went off the air for over a decade. The unaired final episodes eventually premiered on the Freeview channel Challenge in August 2… see more