Blankety Blank Guest cast, played by David Jason Episode 1x08: Show 8 (Mar 15, 1979) Episode 1x11: Show 11 (Apr 5, 1979) Episode 2x07: Show 7 (Oct 18, 1979) Episode 2x10: Show 10 (Nov 8, 1979) Episode 2x17: Christmas Special (Dec 25, 1979) Episode 3x07: Show 7 (Oct 16, 1980)