Another episode with Rick Jason as the only member of the regular/semi-regular cast.
Barbara Babcock has a brief, uncredited role in the pub that Hanley reports to in London. Hans Gudegast, later known as Eric Braeden, has a slightly larger role, also uncredited, later in the story, also in a pub, but in France.
When the German shines a flashlight on the Agent, the flashlight is a civilian two cell round type, not a square military type flashlight.