Claude Luttrell is an employee of Parker Pyne. Described as a lounge lizard it is his job to provide romantic interest for female clients. Although a smooth operator and considered a "hardened lounge lizard", Parker Pyne was surprised and interested when Claude expresses scruples about his role in romancing Maria Packington in The Case of the Middle-aged Wife. This was a development that needed to be watched carefully.
- The Case of the Middle-aged Wife - employed to romance Maria Packington in what Parker Pyne thought of as a archetupal "Schedule A" operation.
- The Case of the Distressed Lady - employed as an exhibition dancer with Madeleine de Sara. He was to dance with Lady Naomi Dortheimer. During a blackout engineered by Madeleine, he was to switch a diamond ring worn by her ladyship with another.
- The Case of the Rich Woman - Parker Pyne told him that case of Mrs Amelia Rymer was not something in his line. Something more unusual was needed.