Two friends get drunk and decide to switch identities. One is a Parliamentary Secretary, and the other is the captain of a ship. The former's lack of sea knowledge causes several catastrophes, including torpedoing the First Lord of The Admiralty. … David Tomlinson, Peggy Cummins, Joan Sims, Brian Reece, Eunice Gayson, A.E. Matthews, Lionel Murton Added on Amazon Prime 2021-02-12.