Agents of SHIELD's FitzSimmons are not happy with Ward's return, although one half of the science wonder twins may take it a little worse than the other.

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Contrary to what you may be thinking, it will be Simmons (Elizabeth Henstridge) who takes serious issue with Ward's (Brett Dalton) role in "The Dirty Half Dozen." Fitz (Iain DeCaestecker) already made a move to beat up the man who stole his unhindered brain functions, but SHIELD's biochem expert may look to put the season 1 traitor in the ground.

Henstridge believes her character will look to make good on her promise to kill Ward. After all, he did try to off her first.

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"Simmons meant what she said," Henstridge, informed Entertainment Weekly. "She hates him so much. He did the worst thing possible to her and took away the most precious thing in her life, which is Fitz."

A prelude to The Avengers: Age of Ultron, "The Dirty Half Dozen" will see the two SHIELD factions unite with Ward in an effort to end HYDRA's experimentation on powered people. The Nazi organization is currently holed up in an arctic base but it's doubtful that they can withstand the might of two SHIELDs, Ward, Deathlok (J. August Richards), and Lincoln (Luke Mitchell).

Find out more when Agents of SHIELD airs Tuesdays at 9 p.m. ET on ABC. Click the video below to see a preview for "The Dirty Half Dozen."