When does Marvel's Agents of S.H.I.E.L.D. return?

Marvel's Agents of S.H.I.E.L.D. is an American television series based on the Marvel Comics organization. The series stars Clark Gregg as Phil Coulson, reprising his role from the film series, alongside Ming-Na Wen, Brett Dalton, Chloe Bennet, Iain De Caestecker, and Elizabeth Henstridge. It was the first to be set in the Marvel Cinematic Universe, and acknowledges the continuity of the franchise's films and other television series. Several episodes directly cross over with the series, notably Captain America: The Winter Soldier (2014) and Agent Carter.
Phil Coulson is the director of S.H.I.L.E.D. in Captain America: The Winter Soldier. The first season follows Coulson as he puts together a small team of agents to handle strange new cases. In the second season, Coulson becomes director of the organization and is tasked with rebuilding it while dealing with Hydra and a newly revealed superhuman race called the Inhumans.