Blankety Blank Guest cast, played by Donald Sinden Episode 14x06: Show 6 (Jul 31, 1999) Episode 14x10: Show 10 (Oct 16, 1999) Episode 15x05: Show 5 (Feb 4, 2001) Episode 15x10: Show 10 (Mar 11, 2001) Episode 15x13: Show 13 (Apr 1, 2001) Episode S14 Special: Christmas Special (Dec 28, 1999)