A Killing on the Exchange Main cast, played by Siân Phillips Episode 1x01: Episode 1 (Mar 6, 1987) Episode 1x03: Episode 3 (Mar 20, 1987) Episode 1x04: Episode 4 (Mar 27, 1987) Episode 1x05: Episode 5 (Apr 3, 1987) Episode 1x06: Episode 6 (Apr 10, 1987)
