Magazine writer Ann Mason infiltrates the United Defenders, a public service organization which is actually a front for racketeers. But a case of amnesia threatens to blow her cover.
| Actor | Role |
|---|---|
 Nancy ColemanAnn Dwire, alias Ann Mason | Ann Dwire, alias Ann Mason |
 Michael O'SheaSteve Fuller | Steve Fuller |
 Sheldon LeonardFred Stalk | Fred Stalk |
 Peter WhitneyJoker | Joker |
 Emory ParnellTrue Dawson | True Dawson |
 Pierre WatkinRalph Borden | Ralph Borden |
 Frank ReicherPop, apartment concierge | Pop, apartment concierge |
| CCay ForesterSally Donahue (as Cay Forester) | Sally Donahue (as Cay Forester) |
 John HamiltonDr. Chalmers | Dr. Chalmers |
 Richard IrvingProtest Rally Orator | Protest Rally Orator |
 Carole DonneBeth Taffel, Borden's secretary | Beth Taffel, Borden's secretary |
 Jimmy ClarkJoe Donahue | Joe Donahue |
 William GouldMr. X | Mr. X |