Black Lightning 1924

Synopsis:

A WWI drama in which a Red Cross dog saves a man.

Directed by: James P. Hogan
Written by: Dorothy Howell
Runtime: 60 minutes
Tagline: A thrilling story of love, adventure and a dog's devotion to his master
Cast:
Thunder
Thunder
Black Lightning (as Thunder the Marvel Dog) 
Clara Bow
Clara Bow
Martha Larned 
Harold Austin
Harold Austin
Roy Chambers 
Eddie Phillips
Eddie Phillips
Ez Howard 
Joe Butterworth
Joe Butterworth
Larned / Dick 
Mark Fenton
Mark Fenton
Doctor