Inspector Hornleigh is a 1938 British detective film directed by Eugene Forde, starring Gordon Harker and Alastair Sim, with Miki Hood, Wally Patch, Steven Geray, and Edward Underdown.

Inspector Hornleigh of Scotland Yard stumbles upon the theft of the Chancellor of the Exchequer's budget secrets, a crime which he ties to a murder he is investigating.

Warmington, is replaced by comedian Gordon Harker, and is given a bumbling sidekick, played by Alastair Sim, solely as comic relief.

The BBC series was a serious detective drama, but in the film the two leading characters play the script for laughs, and the casting of two well-known comedy stars in the parts indicates that this was the director's intention.

The rest of the cast behave as if they are in a straight drama, highlighting the behaviour of Harker and Sim.