- Silver Streak
- Silver Streak, a dog
- Malcolm McGregor
- Lloyd Darrell, posing as Bill Smith
- Louise Lorraine
- Helen Corliss
- George B. Williams
- John Corliss
- Albert J. Smith
- Jack Hutchins
- Anders Randolf
- Benjamin Darrell
- Edith Yorke
- Mrs. Darrell
- Robert Walker
- Henchman
- Dorothy Tallcot
- (as Dorothy Talcott)
- Thurston Fairfax
- (as Thur Fairfax)
- Hughie Mack
- Fat Sidekick
