The Best Episodes Written By Michael Pertwee

When Paul Jason of Jason's Airlines is killed and several of his planes crash, John Drake assumes the identity of a hard drinking pilot to investigate the crash. Drake discovers a case of smuggling and finds himself in a tricky situation.

In Egypt, Drake must uncover the identity of, and save, the mastermind behind the Controller - or the entire Middle Eastern British spy network will be compromised.

Some important things get lost in translation when a South American oil explorer agrees to have his loyal native assistant take his murderous wife to a head shrinker for her health.

Danny runs into political intrigue when he discovers the dead body of a reporter, then can't find it until it turns up in a car crash hours later.

When Danny and Brett find the decade-old dead body of a scientist in a crashed plane in the Scottish Highlands, several women claiming to be his daughter offer them various inducements to part with the formula they found.