The Potarneyland Training Exercise

Sub-Lieutenant Phillips's navigation skills are hired out to a foreign power, but diplomacy breaks down.

Stars Leslie Phillips as the Sub-Lieutenant, Jon Pertwee as the Chief Petty Officer, Stephen Murray as the Number One, Richard Caldicot as Captain Povey, Heather Chasen as WREN Chasen, Ronnie Barker as Commander Bell, Tenniel Evans as LS Goldstein and Michael Bates as the Potarneyland Officer.

Laughs afloat aboard British Royal Navy frigate HMS Troutbridge. The Navy Lark ran for an impressive 13 series between 1959 and 1976.

Scripted by Lawrie Wyman

Producer: Alastair Scott Johnston.

First broadcast on the BBC Light Programme in September 1965.