A disgraced school master, Benjamin Twist, is mistaken for a tough prison governor and assigned the charge of a prison for particularly hardened criminals. Believing he is being sent to a school rather than a prison, he celebrates accordingly only to find that his drunkenness accidently lands him on the wrong side of the prison bars. The Governorship is eventually restored to him, and he sets about popularising himself amongst the convicts by turning a blind eye to their shady dealings.
| Actor | Role |
|---|---|
 Will HayDr. Benjamin Twist | Dr. Benjamin Twist |
 Moore MarriottJerry The Mole | Jerry The Mole |
 Graham MoffattAlbert Brown | Albert Brown |
 Googie WithersLottie | Lottie |
 Peter GawthorneSir Cyril | Sir Cyril |
 Basil RadfordDeputy Governor | Deputy Governor |
| WWilfred WalterMax Slessor | Max Slessor |
 Dennis WyndhamHead Warder | Head Warder |
| AAlf GoddardSykes | Sykes |
| BBasil McGrailBates | Bates |
 Kathleen HarrisonMabel | Mabel |
 Roddy McDowallJimmy | Jimmy |
| TTeddy BrownSlim Charlie | Slim Charlie |
| BBertha BelmoreTiara Lady | Tiara Lady |
 George MerrittPatrolman | Patrolman |
 Roy EmertonJohn Benjamin | John Benjamin |
| LLeonard SharpConvict | Convict |
 Garry MarshJohnson | Johnson |