Q.E.D. is a 1982 short-lived adventure series set in Edwardian England, starring Sam Waterston as Professor Quentin Everett Deverill. The Professor was a scientific detective in the mold of Sherlock Holmes, and the series had a smattering of what would later be called steampunk. In the show, the lead character was known primarily by his initials, Q.E.D; the reference here is that Q.E.D. usually stands for quod erat demonstrandum, a statement signalling the end of a proof. The show aired on the CBS network in the United States, and on Channel 4 in the United Kingdom.

Sam Waterston
Professor Quentin Everett Deverill

George Innes
Phipps
A.C. Weary
Charlie Andrews

Julian Glover
Dr. Stefan Kilkiss

Caroline Langrishe
Jenny Martin
Sarah Berger
Betsy Stevens

Richard Morant
Richard Stevens

Frederick Jaeger
Kaiser Wilhelm II

Robert Harris
Judge
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