A detective who has "four hours to kill" before delivering his prisoner, an escaped killer, spends the time in the lobby of a Broadway theater where a musical is playing. The film focuses on the relationship between the two men, and also between various characters in the theater audience, staff and cast.
| Actor | Role |
|---|---|
 Richard BarthelmessTony Mako | Tony Mako |
 Ray MillandCarl Barrett | Carl Barrett |
 Joe MorrisonEddie | Eddie |
 Gertrude MichaelMrs. Sylvia Temple | Mrs. Sylvia Temple |
 Helen MackHelen | Helen |
 Dorothy TreeMae Danish | Mae Danish |
 Roscoe KarnsJohnson | Johnson |
 Charles Cahill WilsonTaft | Taft |
 Henry TraversMac Mason | Mac Mason |
 Noel MadisonAnderson | Anderson |
 Paul HarveyCapt. Seaver | Capt. Seaver |
 Olive TellMrs. Madison | Mrs. Madison |
 Lee KohlmarPa Herman | Pa Herman |
 Bodil RosingMa | Ma |
| LLois KentLittle Girl | Little Girl |