First broadcast 1st January 1984.

A explorer asks Tommy and Tuppence to help locate his fiancee who has gone missing.

Francesca Annis as Tuppence Beresford
James Warwick as Tommy Beresford
Reece Dinsdale as Albert Batt
Rowena Cooper as Dr Irma Kleber
Mischa de la Motte as Manservant
Susie Fairfax as Girl in Shop
Ewan Hooper as Dr Horriston
Elspeth March as Lady Susan Clonray
Elizabeth Murray as Hermione Leigh Gordon
Jonathan Newth as Gabriel Stavansson
Tim Pearce as Muldoon