Blankety Blank Guest cast, played by Tessa Sanderson Episode 7x18: Show 18 (Feb 1, 1985) Episode 8x02: Show 2 (Sep 13, 1985) Episode 9x20: Show 20 (Feb 27, 1987) Episode 10x17: Show 17 (Jan 22, 1988) Episode 12x08: Show 8 (Dec 7, 1989)