The Secret Adversary
In December 1969 and in February 1993, Blackman was taken by surprise as the subject of "This Is Your Life". In 1972, Blackman (as a "Special Guest Star") and Richard Basehart played a married pair of Shakespearean actors who commit murder in the American crime mystery series "Columbo" (episode "Dagger of the Mind"). In 1983, she appeared in a film production of Agatha Christies novel, "The Secret Adversary", in the role of Rita Vandemeyer, and as Juno/Empress Eugénie in the BBC television production of "Orpheus in the Underworld".