Agents of SHIELD will reveal the origins of that other SHIELD with a little help from the deceased Agent Hartley.

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Lucy Lawless will revisit her short-lived stint as an agent during "One Door Closes," providing viewers will a new look at the day HYDRA brought Fury's organization to its knees. Gonzales (Edward James Olmos) mentioned Hartley saved his life that day, and it looks like viewers will get to see that fateful moment.

"Tuesday's episode will feature the return of Lucy Lawless as Isabelle Hartley. Unfortunately, she's still dead, but we'll get a flashback to the day S.H.I.E.L.D. fell and find out exactly how the real S.H.I.E.L.D. came to be," Entertainment Weekly reported. "Unfortunately, not all of the real S.H.I.E.L.D.'s leaders agree on how to handle the hostile takeover, which will lead to a number of injuries. Injuries, though, not fatalities. Don't worry!"

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Those injuries will undoubtedly take place as Bobbi Morse (Adrianne Palicki) backflips her way through the Playground, supporting a team of anti-Coulson (Clark Gregg) agents as they attempt to obtain Fury's tool box (see video below).

Find out more when Agents of SHIELD airs Tuesdays at 9 p.m. ET on ABC.