Miriam Karlin
Nellie Marsh
Hugh Griffith
Joe Turnbull
Patricia Hayes
Onlooker (uncredited)
Norman Bird
Waterways Supervisor Albert Williams
Eric Sykes
The Mariner
Richard Briers
Tomkins
Barbara Windsor
Factory Girl (uncredited)
Harry H. Corbett
Hemel Pike
Brian Wilde
Policeman
Ronnie Barker
Ronnie
Julia Foster
Christine Turnbull
Michael Robbins
Bargee
Eric Barker
Mr Parkes, the Foreman
Derek Nimmo
Dr. Scott
George A. Cooper
Official in Office
Jo Rowbottom
Cynthia