Death on the Set on AllMovie

Befitting its title, Death on the Set takes place in a British film studio (thereby saving on set-construction costs!). Little does anyone suspect that autocratic film director Cayley Morden (Henry Kendall) is in reality an American fugitive from justice. His secret is ultimately discovered by Morden's look-alike, Charlie Marsh (also Henry Kendall), who demands an exorbitant payment in exchange for his silence. Carefully arranging an alibi, Morden murders Marsh and for most of the proceedings manages to elude detection. Alas, in his efforts to cover his tracks, Morden is forced to commit a second murder, and that's when his web of deceit begins to unravel.