The second of two appearances in the series by Arthur Gomez, the first being in E11, The Angola Brights (1959).
The last of four appearances as Captain Pagano by George Pastell, the others being E4, The Two-Headed Monster (1959), E14 The Man's a Clown (1959) and E18 The Thousand Mile Alibi (1960).
The third of four uncredited appearances in the series by Emile Stemmler, the others being in E5, The Long Weekend (1959), E7 Diamond S.O.S. (1959) and E35 Dressed to Kill (1960).
The third of four uncredited appearances in the series by Jack Armstrong, the others being E8, Private View (1959), E20 Game for Three Hands (1960) and E34 Eight Days Inclusive (1960).
The first of two appearances in the series by Stanley Van Beers, the other being in E29, Slow Boat to Amsterdam (1960).