Serenade for Two Spies
Serenade für zwei Spione (original)
A gang of gunrunners has stolen the prototype of a laser gun from a laboratory. The FBI agent Cormoran is set to recover the weapon. But there are signs that he has defected to the enemy. And so the German secret agent John Krim gets the order to bring back the gun, find evidence for Cormoran's treason and take out his colleague.
Watch "Serenade for Two Spies" on Amazon released in 1965. It's a action & adventure and thriller movie, and has a rating of 6.2 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.