This John Collier short story was adapted earlier in the first season of an Alfred Hitchcock presents (1955) episode using the same title.
As of February 2021, this was the one and only screen performance by Henry Palmer, Jack Gilvey, Ronald Fairbrother, Angela Evans, Annette Collins, Andrew Lebas and Mark Kenyon.
The second of three appearances in the series by Cyril Luckham , the other two being S1 E1, The Man from the South (1979) and S2 E15, The Orderly World of Mr. Appleby (1980).
The first of three appearances by Richard Johnson, the others being S4 E1, Would You Believe It? (1981) and S5 E17, Who's Got the Lady? (1982).