Basil Dearden Director Richard Attenborough Silas Actor David Hemmings Bob Actor Alexandra Stewart Liz Actor Nicholas Pennell Spencer Actor Melissa Stribling Diana Actor Terence Alexander Gee Gee Gray Actor Edric Connor Awana Actor Clifton Jones Gen. Sakut Actor Calvin Lockhart Alf Lin Actor Brian Grellis Spider Actor David Healy Jones Actor Alan Gifford Poster Actor Len Deighton Producer Brian Duffy Producer