When customs and excise men arrive at the village of Dymchurch in Kent, they uncover an intricate smuggling network being coordinated by the local parson, Dr Syn. Dr Syn hides that he was once a notorious pirate.
- George ArlissDr. Syn
- Margaret LockwoodImogene Clegg
- John LoderDenis Cobtree
- Roy EmertonCapt. Howard Collyer, R.N.
- Graham MoffattJerry Jerk
- Frederick BurtwellRash the Schoolmaster
- George MerrittMipps the Coffin Maker
- Athole StewartSquire Anthony Cobtree
- Wilson ColemanDr. Pepper, MD
- Wally PatchCollyer's Bo'sun
- Meinhart MaurMulatto
- Muriel GeorgeMrs. Waggetts, Pub Owner
- Wallace BoscoMan in Court
- Leonard SharpRevenue Man