The third 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 E26 The Girl with Grey Hair (1960).
The third of five uncredited appearances in the series by Johnny Rossi, the others being in E2, The Money Game (1959), E9 Dead on Arrival (1959), E24 Checkmate (1960) and E39 The Absent Assassin (1960).
The third of four appearances in the series by Roland Bartrop, the others being E7, Diamond S.O.S. (1959) where he first played Grimod, E9 Dead on Arrival (1959), and E27 Trial at Cranby's Creek (1960).