The Secret Call is adapted from The Woman, a play by William C. DeMille (brother of Cecil B.) Peggy Shannon plays Wanda Kelly, the daughter of a disgraced politician. Reduced to working as a switchboard operator, Wanda is privy to the many secrets and indiscretions of the clients of a big-city hotel. She also finds romance in the form of handsome Tom Blake (Richard Arlen). The huge cast of characters comes in handy for the film's multitude of subplots, none of which ever get their wires crossed. Peggy Shannon acquits herself nicely in her first major role, but by the end of the decade her career was in decline.
| Actor | Role |
|---|---|
 Richard ArlenTom Blake | Tom Blake |
 Peggy ShannonWanda Kelly | Wanda Kelly |
 William B. DavidsonJim Blake | Jim Blake |
 Charles TrowbridgePhil Roberts | Phil Roberts |
 Ned SparksBert Benedict | Bert Benedict |
| JJane KeithleyGrace Roberts | Grace Roberts |
 Selmer JacksonMatt Stanton | Matt Stanton |
 Jed ProutyJim Neligan | Jim Neligan |
 Charles D. BrownBob Barnes | Bob Barnes |
 Harry BeresfordFrank Kelly | Frank Kelly |
| EElaine BakerVera Lorraine (uncredited) | Vera Lorraine (uncredited) |
 Claire DoddMaisie (uncredited) | Maisie (uncredited) |
 Patricia FarrEllen (uncredited) | Ellen (uncredited) |
| PPerry IvinsBill, Jim Blake's Secretary (uncredited) | Bill, Jim Blake's Secretary (uncredited) |
| FFrances MoffettGwen Allen (uncredited) | Gwen Allen (uncredited) |
 Larry SteersFillmore (uncredited) | Fillmore (uncredited) |