Mr Foster and his sister live quietly in the suburbs but are not what they seem, possessing scientific knowledge far in advance of humanity.
Director
Writers
Richard Pearson
Mr. Foster
Freda Bamford
Miss Foster
Bernard Hepton
Harry Gerwyn
Yvonne Manners
Mary Gerwyn
Ann Penfold
Sally Gerwyn
Kevin Stoney
Calton
Anton Darby
Geoff
Richard Pescud
Cazelet
Alan Ross
Bob
John Berwyn
Japhet
Pauline Cunningham
Anne
John Dawson
Digby
Rose Hill
Geoff's Mother
