The second of two appearances in the series by Colette Wilde, the first being in E6, You Can't Die Twice (1959).
The second of two uncredited appearances in the series by Barry Johns, the first being in E9, Dead on Arrival (1959).
The last of four uncredited appearances in the series by Bob Raymond, the others being E9, Dead on Arrival (1959), E17 Mr. George (1960) and E25 Fingers of Guilt (1960).
The second of two appearances in the series by John Salew, the first being in E25, Fingers of Guilt (1960).