The second of four uncredited appearances by Louis Matto, the others being E4, The Two-Headed Monster (1959), E24 Checkmate (1960) and E31 A Foreign Body (1960).
The second of four uncredited appearances in the series by Jack Armstrong, the others being E8, Private View (1959), E26 The Girl with Grey Hair (1960) and E34 Eight Days Inclusive (1960).
The first of two appearances in the series by Paula Byrne, the other being in E35, Dressed to Kill (1960).
The first of two appearances in the series by Russell Waters, the other being in E39, The Absent Assassin (1960).