Working-class British housewife Myra Savage reinvents herself as a medium, holding seances in the sitting room of her home with the hidden assistance of her under-employed, asthmatic husband, Billy. In an attempt to enhance her credibility as a psychic, Myra hatches an elaborate, ill-conceived plot to kidnap a wealthy couple's young daughter so that she can then help the police "find" the missing girl.
You can now watch Seance on a Wet Afternoon online on the following streaming providers in the United States.
| Production | Bryan Forbes | Producer |
| Directing | Bryan Forbes | Director |
| Sound | John Barry | Original Music Composer |
| Writing | Bryan Forbes | Screenplay |
| Camera | Gerry Turpin | Director of Photography |
| Production | Richard Attenborough | Producer |
| Editing | Derek York | Editor |
| Writing | Mark McShane | Novel |
| Art | Ray Simm | Art Direction |
| Production | Jack Rix | Associate Producer |
| Costume & Make-Up | Stuart Freeborn | Makeup Artist |
| Sound | Bill Daniels | Sound Recordist |
| Directing | Christopher Dryhurst | Assistant Director |
| Directing | Penny Daniels | Continuity |
| Camera | Gerry Anstiss | Assistant Camera |
| Art | Peter James | Set Dresser |
| Costume & Make-Up | Laurel Staffell | Wardrobe Supervisor |
| Camera | David Harcourt | Camera Operator |
| Sound | George Fisher | Sound Editor |
| Sound | Gus Lloyd | Sound Assistant |
| Costume & Make-Up | Barbara Ritchie | Hairdresser |
| Camera | Ted Lockhart | Grip |
| Art | Jock Lyall | Construction Manager |
| Sound | John Barry | Conductor |
| Camera | George Courtney Ward | Still Photographer |
| Production | Ann Skinner | Production Secretary |
| Art | Alan Roderick-Jones | Set Dresser |
| Art | Dickie Bamber | Dressing Prop |
| Directing | Simon Relph | Assistant Director |
| Production | Diana Hawkins | Publicist |
