You're Only Young Twice!: Cast
Duncan Macrae
Professor "Haywire" Hayman
Joseph Tomelty
Connell O'Grady aka Dan McEntee
Patrick Barr
Sir Archibald Asher
Charles Hawtrey
Adolphus Hayman
Diane Hart
Ada Shore
Robert Urquhart
Sheltie
Edward Lexy
Lord Carshennie
Jacqueline Mackenzie
Nellie Kelly
Eric Woodburn
The Bedellus
Molly Urquhart
Lady Duffy
Ronnie Corbett
Maither
Reginald Beckwith
Radio reporter
Russell Waters
Professor Baikie
Wendy Noel
Miss Mear
Roddy McMillan
Milligan
Alastair Hunter
Desk Sergeant
Andrew Downie
Student
Archie Duncan
Police Constable