Passport to Suez (1943; also known as A Night of Adventure and The Clock Strikes Twelve) is the 20th film featuring the Lone Wolf character.

It was the eleventh of fifteen in the Columbia Pictures series, and the last to star Warren William as the lead character, a jewel thief turned private detective.

Fritz comes to drive him, supposedly to see Sir Robert Wembley, head of the British secret service in the region.

When Lanyard meets with Wembley, the spymaster makes clear that he does not want an amateur's help, but reluctantly agrees to let the Lone Wolf play along in order to gather more information.

Complicating matters further, Lanyard and Jamison encounter the latter's son Donald, a British naval officer, and his fiancée, reporter Valerie King in Booth's nightclub.

They also discover the body of Whistler and a clue, shards of a distinctive watch crystal, just like the one King has, microfilming equipment, and ashes of the defence plans.

"His most enduring legacy, especially to later directors and film students, was a series of superb B movies – mostly westerns and crime dramas that he made in the late 1940s and 1950s.

[5] Film historian Leonard Maltin considered Passport to Suez as a worthy addition to the "Lone Wolf" series: "Nazi spies lead sleuth William on a wild goose chase as part of a plan to blow up the Suez Canal in this well-made Lone Wolf entry with more comedy relief from Blore than usual.