Noah Beery as Dr. Ord

Pat O'Malley as Kirk Connelly

Agnes Ayres as Helen Allen

J. Barney Sherry as 'Shut the Door' Gordon

Bull Montana as The Gorilla

Wesley Barry as Dinty

Charles Hill Mailes as J.L. Rich (as C. Mailles)

Walter Long as Jim Hogan

Lydia Yeamans Titus as Lilly Doody

George Dromgold as Thomas Hickson

Edward Cooper as W.W. Crocker

Charles West as Slim Hogan