It's a Mystery, Charlie Brown

Air Date: November 24, 2011

Air Date: November 20, 2006

Air Date: December 9, 2003

Air Date: August 29, 2003

Air Date: December 8, 2002

Air Date: February 14, 2002

Air Date: unknown

Air Date: January 18, 1994

Air Date: November 27, 1992

Air Date: May 1, 1991

Air Date: March 16, 1990

Air Date: September 27, 1988

Air Date: January 29, 1988

Air Date: January 1, 1986

Air Date: November 6, 1985

Air Date: March 20, 1985

Air Date: April 16, 1984

Air Date: May 30, 1983

Air Date: May 16, 1983

Air Date: February 21, 1983

Air Date: May 24, 1982

Air Date: October 30, 1981

Air Date: April 28, 1981

Air Date: October 24, 1980

Air Date: February 25, 1980

Air Date: March 19, 1979

Air Date: February 23, 1978

Air Date: October 24, 1977

Air Date: March 16, 1976

Air Date: October 28, 1975

Air Date: January 28, 1975

Air Date: April 9, 1974

Air Date: February 1, 1974

Air Date: November 20, 1973

Air Date: March 11, 1973

Air Date: October 29, 1972

Air Date: March 28, 1971

Air Date: September 27, 1969

Air Date: February 14, 1968

Air Date: June 12, 1967

Air Date: October 1, 1966

Air Date: June 8, 1966