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 Waterstonas Professor Quentin Everett Deverill
George Innesas Phipps
Julian Gloveras Dr. Stefan Kilkiss
Caroline Langrisheas Jenny Martin
Richard Morantas Richard Stevens
Frederick Jaegeras Kaiser Wilhelm II
Robert Harrisas Judge
Ronald Laceyas Medium
Julia Jones
William Froug