沃利·帕奇

Wally Patch

饰：Police Officer Tiny White

Norman Hackforth

饰：Himself - Twenty Questions mystery voice

Stewart MacPherson

饰：Himself - Twenty Questions chairman

Daphne Padel

饰：Herself - Twenty Questions panelist

罗伯特·比提

Robert Beatty

饰：Bob Beacham

罗娜·安德森

Rona Anderson

饰：Mary Game

克利福德·埃文斯

Clifford Evans

饰：Tom Harmon

Edward Lexy

饰：Det. Insp. Charlton

奥尔加·林杜

Olga Lindo

饰：Olive Tavy

弗雷德里克·莱斯特

Frederick Leister

饰：Police Commissioner

哈罗德·斯科特

Harold Scott

饰：Maurice Emery KC

Meadows White

Meadows White

饰：Frederick Tavy

Kynaston Reeves

饰：Gen. Maitland

让娜·德卡萨利

Jeanne De Casalis

饰：Herself - Twenty Questions panelist

Richard Dimbleby

饰：Himself - Twenty Questions panelist

Norman Pierce

Jack Train

饰：Jack Train - The Twenty Questions Team Member

梅尔·托特纳姆

Merle Tottenham

亚瑟·杨

Arthur Young

饰：Doctor

琼恩·维特费尔德

June Whitfield

Gordon McLeod

饰：Record News Editor

利亚姆·雷德蒙

Liam Redmond

饰：Echo News Editor,(as Liam Redman)

Howard Douglas

John Salew

饰：John Grimshaw

Homi Bode

饰：Mohammed Ali,(as Homi D. Bode)

约翰尼·斯科菲尔德

Johnnie Schofield