Professor Petersen's Pals (1924)

Birdwatcher Professor Petersen goes on a summer trip to a remote rocky island. The uninhabited island is home to birds, disturbing scantily clad young girls and a gang of bootleggers. Pat Patachon reluctantly toil for the smugglers, who take Professor Petersen prisoner. The two friends are assigned to guard the suspected spy Petersen, but soon escape together with their new pal. (Stumfilm.dk).