
Acting
Frank Shannon was an Irish-born stage and screen performer. He had his film debut in The Prisoner of Zenda (1913). He is most fondly remembered as the brilliant Dr. Zarkov in the three Flash Gordon serials.

Spaceship to the Unknown
as Dr. Hans Zarkov (archive footage)

Purple Death from Outer Space
as Dr. Zarkov

Flash Gordon: The Deadly Ray From Mars
as Dr. Alexis Zarkov

Peril from the Planet Mongo
as Dr. Zarkov

A Dangerous Profession

Crack-Up
as Train Station Gateman (Uncredited)

Batman
as Dr. Hayden

The Phantom
as Professor Davidson

Ten Gentlemen from West Point
as Senator (uncredited)

The Secret Code
as Police Commissioner
Union Pacific
1939