Check out two clips for tonight's Marvel's Agents Of S.H.I.E.L.D. which sees the return of Jaimie Alexander as Sif from the Thor movies.
Agents Of S.H.I.E.L.D. airs at 9pm ET Tuesdays on ABC.
Coulson and team come to the aid of a confused Lady Sif, who has lost her memory after fighting with a mysterious warrior whose true mission will send shockwaves through S.H.I.E.L.D. Meanwhile, Bobbi and MacK continue to hide their true mission from everyone close to them.