Smart Alec is a 1951 British crime film directed by John Guillermin and starring Peter Reynolds.

Plot

Young Alec Albion plans to kill his rich uncle. He sets himself up in an apartment overlooking his uncle's and carefully times himself going from one room to another by use of a particular music record. He has a new young wife, Judith, but is visited in the flat by Sylvia, a woman with whom he is obviously on intimate terms. His wife sees her coming from the direction of their flat, but Alec lies that she had accidentally come to the wrong door.