| Del Gruner |
|Occupation||Head of Leda|
|Behind the scenes|
|Appearances||"The Illustrious Client"|
|Portrayed by||Stuart Townsend|
Del Gruner (full name Adelbert Gruner) is the head of Leda Insurance Firm. He provides Joan Watson with much needed employment when she's looking to stretch her wings out from under Sherlock's shadow.