May's Bahrain incident will soon start to come to light on Agents of SHIELD.

Meet Cal's Villainous Team On 'Agents Of SHIELD' [PHOTO], New Sneak Peek For 'One Of Us'

Ming-Na Wen's laconic agent earn the nickname "The Calvary" for her actions in the Middle Eastern archipelago, but the acclaimed status came at a great price. Haunted by the event, May briefly traded field ops for a desk jockey position until Coulson (Clark Gregg) brought her onto his team.

Now, it looks like the Bahrain mission will have some connection to the current Inhumans plotline.

New Wedge Forms Between FitzSimmons On 'Agents Of SHIELD', Elizabeth Henstridge On Dealing With Skye

"You will get a big clue about it that surprisingly relates to Skye," Entertainment Weekly teased, indicating that answers will begin to materialize when May's ex-husband Dr. Andrew Garner (Blair Underwood) appears in "One of Us."

With a background in neurologist and forensic psychologist, Garner will come to examine Skye (Chloe Bennet). He is believed to have experience dealing with people on SHIELD's index and that will undoubtedly come in helpful as Cal's mini army of super villains looks to take down Coulson in Tuesday's episode.

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 "One of Us."

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Marvel's Agents of S.H.I.E.L.D., Television, ABC, Marvel