Marvel's Agents of S.H.I.E.L.D. is gearing up for it's Midseason return on March 3rd with the episode Aftershocks. But Thor fans will want to keep their DVRs set for the following week's untitled episode, which will see the return of Jaimie Alexander as fan-favorite Lady Sif. Only this time, there will be a major twist.

Don't expect a trip down memory lane for the Asgardian warrior. When she returns to face Coulson and his crew, she will be suffering from short-term memory loss. She will remember nothing of her time spent fighting alongside Thor. Nor will she know why she has returned to Earth, or what threat she faces. Says Executive producer Jeffery Bell:

RELATED: Agents of S.H.I.E.L.D. Star Dove Cameron Would Jump at the Chance to Join Another MCU Project
"[W]e're going to have fun with that It'll give us some much-needed humor in a season that's been full of betrayal and death."

Jaimie Alexander first appeared as Lady Sif in the fifteenth episode of Marvel's Agents of S.H.I.E.L.D. Season 1 entitled Yes Men. As far as her return this spring, it has been confirmed that the Norse Goddess will have a 'body-slamming showdown' before she teams up with Couslon and his team. Who will she be fighting? We won't know until closer to the airdate, as the Marvel villain is being kept under wraps for the time being. Guesses anyone?