Task built up to a deadly - and yet promising - series finale, but did the HBO series wrap up every story line? During the finale, which aired on Sunday, October 19, Grasso (Fabien Frankel) tried to make amends after he was revealed to be the mole working with Jayson (Sam Keeley). Speaking of the Dark Hearts member, Jayson was on the run with Perry (Jamie McShane) when he found out his wife was murdered - and Jayson's mentor was to blame. Jayson killed Perry before tracking down Maeve (Emilia Jones) to steal the money that Robby (Tom Pelphrey) left for her.