Dermot Mulroney joins 'Shameless' Season 5 as Fiona's new bossAdd to Favorites | Shameless
The season-long arc will see Mulroney guest star as a former bad boy and recovering addict named Sean Pierce, who just so happens to be Fiona's new manager at Patsy's Pies.
Apparently Fiona didn't learn her lesson in Season 4, because the twosome's relationship will quickly turn flirtations as the sexual tension between them rises.
Jeffrey Dean Morgan appeared as Fiona's new boss in the final moments of the "Shameless" Season 4 finale.
Mulroney most recently appeared in NBC's hostage drama "Crisis."