Arrow (2012)

S4E1 Green Arrow

Oliver and Felicity's relaxing retreat is abruptly interrupted when Thea and Laurel arrive, urging Oliver to come back to Star City. They inform him that the city is under siege by Ghosts, a group of assassins commanded by the menacing Damien Darhk. Upon Oliver's return, Diggle expresses his strong disapproval of Oliver rejoining the team, making it clear that he wants him out.