'A Change of Bait' by Lewis Davidson

When Archie an elderly man who suffers from heart disease, tries to sell a consignment of bananas, he is caught up in an insurance scam by a crook named Lemuel Potts, who attempts to hold up the transaction long enough for the fruit to go rotten, enabling his accomplice, Bartsow, to claim on the insurance. But Steed intervenes, and the deal goes through. Potts then attempts to collect on another insurance policy on by burning down an antique shop; however, Steed and Keel arrive and put the fire out, and then photograph Potts when he attempts to relight the fire. Steed tricks Potts into revealing his accomplice, Barlow. As the villains are arrested, Steed gets Potts to give him a cheque, which he uses to pay Archie for the bananas, much to the amusement of Doctor Keel.

Ian Hendry (Doctor David Keel), Patrick Macnee (John Steed), Victor Platt (Archie Duncan), Henry Soskin (Lemuel Potts), Henry Soskin (Peter Sampson), Ingrid Hafner (Carol Wilson), Robert Desmond (Herb Thompson), Graham Rigby (Nat Fletcher), Gary Hope (Barker), Arthur Barrett (Andre), Norman Pitt (Bryan Stubbs), Gillian McCutcheon (Ivy), Harry Shacklock (Charlie), Michael Hunt (Steed's Helper)

Directed by Don Leaver
Produced by Leonard White

TX:
UK: 23rd December, 1961

Notes:
*Featuring Doctor David Keel and John Steed

*This episode no longer exists