What happens
Alan Rogers, a freelance correspondent working for French intelligence, is sent to Switzerland to track a dangerous group who call themselves Smith and are after the plans for France's new rocket bases. After a tobacconist named Mont is murdered, Rogers meets Mary Donley and a man calling himself Warwick Smith at the Grand Hotel. The pair travel by train toward Basel, and Rogers follows them. This is Escape episode 141, "A Bullet for Mr. Smith," part one, originally aired on January 14, 1951, in the Escape series. John Dehner stars as Alan Rogers.
Western Europe: Paris, a Swiss tobacco shop near the border at Devon, the Grand Hotel in Nyon, and a train bound for Basel.
Characters: Alan Rogers, Mary Donley, Mr. Smith, Mont, Tall Chief, Laura
Listen for: Rogers noticing that the man on the Basel platform matches the French description of Mr. Smith, and the tense compartment standoff on the train.
Written from the episode itself; it never gives away the ending. Every recording is remastered for the stream: cleaned of rumble, hiss and mains hum (and the old TV whine where we found it), then levelled in two passes to steady broadcast loudness, so one show is never quieter than the next.