 | Glenda Jackson als Neaera Duncan |
 | Ben Kingsley als William Snow |
 | Richard Johnson als Mr. Johnson |
 | Michael Gambon als George Fairbairn |
 | Rosemary Leach als Mrs. Inchcliff |
 | Eleanor Bron als Miss Neap |
 | Harriet Walter als Harriet Sims |
 | Jeroen Krabbé als Mr. Sandor |
 | Nigel Hawthorne als Publisher |
 | Michael Aldridge als Mr Meager |
 | Peter Capaldi als Assistant Keeper |
 | Gary Olsen als Lorry Driver |
 | Tony Melody als Garage Attendant |
 | Harold Pinter als Man in Bookshop |
 | Barbara Rosenblat als American Woman |
 | Chuck Julian als American Man |
| Rom Anderson als Girl at Zoo |
 | Bryan Pringle als Zoo Receptionist (uncredited) |
 | Jeremy Nicholas als 2nd Publisher (uncredited) |
 | Dave Hill als Taxi Driver (uncredited) |
| Pauline Letts als Woman at Bookshop (uncredited) |
| Mark Jefferis als Policeman at Square (uncredited) |
 | Neil Conrich als Zoo Waiter (uncredited) |
| Ronnie Walsh als Man at Tube (uncredited) |
| Robert Keegan als Fisherman (uncredited) |
| John Irvin | Director |
| Russell Hoban | Novel |
| Harold Pinter | Screenplay |
| John Braithwaite | Thanks |
| Diane Dancklefsen | Art Direction |
| Peter Tanner | Editor |
| Egil S. Woxholt | Underwater Camera |
| Stevie Hall | Hair Supervisor |
| Henry Lowther | Musician |
| Stephen Cornish | Wardrobe Master |
| Michael Connell | Music Editor |
| David Hildyard | Sound Recordist |
| Dave Burrell | Thanks |
| Christabel Albery | Production Supervisor |
| Peter Snell | Executive Producer |
| Leo Austin | Production Design |
| Craig Chandler | Visual Effects |
| Bernard Sofronski | Executive Producer |
| Richard Johnson | Producer |
| Peter Hannan | Director of Photography |
| Mary Hillman | Key Makeup Artist |
| Elizabeth Waller | Costume Designer |
| Susie Figgis | Casting Director |
| Geoffrey Burgon | Music |
| Lesley Cross | Continuity |
| Teddy Mason | Sound Editor |
| Howard Coomber | Thanks |
| Judith Lang | Art Direction |
| Michael Zimbrich | Assistant Director |
