|Dates||???? – 2010 (killed by the Leprechaun)|
|Episode(s)||6.09 Clap Your Hands If You Believe...|
Mr. Brennan is a watchmaker whose working life is threatened when Parkinson's disease causes tremors in his hands. His grandmother believed in fairies and left him a spell book that he uses to summon a leprechaun.
The Leprechaun promises him workers in exchange for being able "to take of the fruit and fat of the land." This results in a number of firstborn sons in the town being abducted, including Mr. Brennan's son, Patrick.