Cowboy star Ken Maynard trots out one of his favorite plot devices in Whistlin' Dan. Once again, Maynard poses as a crook in order to infiltrate an outlaw gang. It's all for the purpose of getting even with the men responsible for his partner's murder. The most surprising aspect of the film is its leading lady, exotic dancer Joyzelle Joyner, best remembered for her performance as a leering lesbian in DeMille's Sign of the Cross. Director Phil Rosen, presumably following Ken Maynard's instructions, invests Whistlin' Dan with an abundance of offbeat camera angles.