The Asgardians might be able to shed a little light on Agents of SHIELD's Inhumans.

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Lady Sif (Jamie Alexander) will return to Midgard in episode 12, "Who You Really Are," and although she will suffer a bout of amnesia, her childhood memories may prove instrumental as SHIELD struggles to understand Skye (Chloe Bennet) and her new powers.

"We've been dealing a lot with space aliens and Inhumans in our last few episodes-things our Earth-bound heroes just don't know much about," executive producer Jeff Bell said, according to TV Insider. "They need help understanding what's really going on. Sif's memory-what's left of it-will come in very handy."

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First, however, the agents will need to handle the baddie Sif was battling when her short-term memory took a blow. Marvel has yet to reveal the warrior's nemesis, but the pair's Portugal-based battle will be big enough to attract media attention. When Coulson (Clark Gregg) and Co. arrive on scene, Sif will have no recollection of Thor or her current mission.

"It'll give us some much-needed humor in a season that's been full of betrayal and death," Bell teased. "Sif can't even recall who she came here from Asgard to stop, but Agent Coulson and his team will try to help her figure all that out."

Find out more when Agents of SHIELD returns to ABC on March 3 at 9 p.m. ET. Click the video below to see a preview for the midseason premiere, "Aftershocks."