Blocked Signals (German: Blockierte Signale) is a 1948 German thriller film directed by Johannes Meyer and starring Heidi Kürschner, Heinz Engelmann, and Wolfgang Lukschy.

The police investigation revealed that sinister business was being transacted through the company: Drugs and medicines in particular were trafficked or smuggled.

Eventually, the go-getting protagonist takes the initiative and helps the investigating police inspector Ostendorff to dig out the entire gang when the latter is about to rob an entire freight train on the banks of the Elbe.

Blocked Signals was created in the film studios of Hamburg-Volksdorf and Hamburg-Ohlstedt as well as in the port of Hamburg (outdoor shots).

You can help Wikipedia by expanding it.This article about a 1940s thriller film is a stub.