A funny thing happened to Lurkalot, serf to Sir Coward de Custard, on the way to Custard Castle. Lurkalot sells lusty love potions and rusty chastity belts in the market place, but on this day Sir Graggart de Bombast arrives to sack the castle, and to get the lovely Lobelia Custard in the sack! Lurkalot must help Custard cream the knight in pining armour...
| Writing | Ray Galton | Writer |
| Writing | Alan Simpson | Writer |
| Writing | Sid Colin | Writer |
| Directing | Bob Kellett | Director |
| Sound | Bill Rowe | Sound Recordist |
| Costume & Make-Up | Richard Mills | Makeup Artist |
| Directing | Mike Gowans | Assistant Director |
| Production | Thelma Graves | Casting |
| Camera | Tony White | Camera Operator |
| Costume & Make-Up | Brenda Dabbs | Wardrobe Master |
| Art | Seamus Flannery | Production Design |
| Art | Ernie Blake | Construction Manager |
| Costume & Make-Up | Susie Hill | Hairdresser |
| Costume & Make-Up | Ramon Gow | Hairdresser |
| Production | Pat Green | Production Supervisor |
| Sound | Carl Davis | Original Music Composer |
| Camera | Ian Wilson | Director of Photography |
| Costume & Make-Up | Penny Lowe | Costume Design |
| Directing | Doreen Dearnaley | Continuity |
| Production | Terry Glinwood | Producer |
| Editing | Al Gell | Editor |
| Sound | Ian Fuller | Sound Editor |
| Production | Beryl Vertue | Executive Producer |
| Production | Ned Sherrin | Producer |
