McGarrett and Danny pose as drug pilots in a plan to stop a meth epidemic on the island; Danny is forced to break cover and land the plane when McGarrett is seriously wounded.
Rosie and Villa must establish the true identity of a murder victim who appears to have died three years prior; TMI attempts to reconnect with Pippy; Donna struggles to keep a secret from her family.
Coulson and the team set out to rewrite the course of humanity's fate; they're unaware that their efforts will dramatically change one S.H.I.E.L.D. agent's life.