Let's do that movie!

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.

Flash Gordon
Dr. Hans Zarkov
64

Mannequin
Police Sergeant at Jail (Uncredited)
58

End of the Trail
Sheriff Anderson
80

Flash Gordon Conquers the Universe
Dr. Zarkov
58

The Texas Rangers
Captain Stafford
63

The Prisoner of Shark Island
Mr. Holt
68

The Phantom
Professor Davidson
62

The Night of Nights
Frank, the Bartender (uncredited)
0

Flash Gordon's Trip to Mars
Dr. Zarkov
62

Purple Death from Outer Space
Dr. Zarkov
52

Blondes at Work
Capt. McTavish
61

Boomerang Bill
Terrence O'Malley
20

Torchy Runs for Mayor
Captain McTavish
57

Torchy Blane... Playing with Dynamite
Inspector McTavish
60

Wildcat Bus
Sweeney
49

Black Gold
Dan O'Reilly
50

Woman in the Dark
Prison Warden
59

Federal Fugitives
Hammond
54

A Burglar to the Rescue
The Burglar, Holtz aka Jack Dunning
80

Rawhide Rangers
McDowell
50

Ever Since Eve
Desk Sergeant (uncredited)
55

Next Time I Marry
Police Lieutenant (uncredited)
70

The Murder of Dr. Harrigan
Police Sergeant
56

Men Without Names
Agent Joe
60

Union Pacific
Old Man (uncredited)
65

The Ship That Died
Minor Role (uncredited)
58

Rocket Ship
Dr. Hans Zarkov
48

You Can't Take It with You
Mac (uncredited)
74

Torchy Blane in Panama
Captain McTavish
53

The Eagle's Brood
Mike
47

Torchy Blane in Chinatown
Police Capt. McTavish
60

Emergency Squad
Construction Supervisor at Elevator
50

Brigham Young
Second Man with California Gold News
44

The Return of Frank James
Sheriff
63

The Phantom
Professor Davidson
62

A Dispatch from Reuters
Mr. O'Malley - Captain of the Nova Scotian (uncredited)
61

The Prisoner of Zenda
Detchard
35

Road Gang
Chaplain (uncredited)
65

Over the Wall
Duke Slattery - Policeman with Warrant
50

The Bride's Play
Sir John Mansfield
49

Mars Attacks the World
Dr. Alexis Zarkov
60

Ten Gentlemen from West Point
Senator (uncredited)
58

The Secret Code
Police Commissioner
51

Icebound
Judge Bradford
0

The Perfect Set-Up
Detective Hewitt (uncredited)
60

The Adventurous Blonde
Captain McTavish
50

Torchy Gets Her Man
Police Captain McTavish (uncredited)
56

Batman
Dr. Hayden
63

Rulers of the Sea
Kelsey (Uncredited)
65

'G' Men
Police Chief at Lodge (uncredited)
65

Spaceship to the Unknown
Dr. Hans Zarkov (archive footage)
60

The Pace That Kills
Mr. Farley
28

A Dangerous Profession
56

Monsieur Beaucaire
Badger
52

Crack-Up
Train Station Gateman (Uncredited)
56

Flash Gordon: The Deadly Ray From Mars
Dr. Alexis Zarkov
100

Perjury
Phil Rourke
0

Peril from the Planet Mongo
Dr. Zarkov
60