Knock on Wood

Discovering that a ventriloquist is travelling to Zurich, a spy ring hides secret plans in his dummies' heads. When a second spy ring learns of the plans, they descend upon the ventriloquist, causing city-wide pandemonium.

Knock on Wood is a 1954 comedy movie, starring Mai Zetterling, David Burns, Torin Thatcher. It holds an IMDb rating of 6.7/10 from 1,289 votes and runs 1h 43m.