Phil Coulson (Clark Gregg) and Daisy (Chloe Bennet) will begin to question the true motives of Rosalind Price (Constance Zimmer) and the Advanced Threat Containment Unit (ATCU) in the upcoming episode of the ABC series "Agents of S.H.I.E.L.D."

In "Among Us Hide...," Comicbook reports that the leader of S.H.I.E.L.D. and his protégée think that the group is keeping a big secret from them. It appears that their temporary allegiance to track down Inhumans is already cracking at the seams. Meanwhile, Hunter (Nick Blood) and May (Ming-Na Wen) will be busy going after Ward (Brett Dalton) and the Hydra.

Last episode, viewers finally learned what happened to Simmons (Elizabeth Henstridge) after she got absorbed by the portal. For six months, she was trapped in on a different planet. While she battled for survival, she met a man who told her he was part of the team NASA sent through the monolith back in 2001. Will ((Dillon Casey) and his crew got stranded while on the mission and had been there ever since.

The International Business Times reports that three of Will's friends died on the planet. Will said it was because the sandstorm was concealing a monster that could get inside their head and make them crazy. Simmons thought it was the total isolation that drove them mad enough to kill. The two immediately planned to get out of the planet.

Through Simmons' expertise, they were able to identity the next location where the portal would appear. But as it became apparent that they would not get there in time, they sent a message in a bottle instead. Months passed and the two developed an intimate relationship. On the day that they saw a flare, they got separated and Simmons believed he was shot.

Back to the present time, Simmons told Fitz she has to go back and save Will. She said if it weren't for him, she would not have survived. Fitz said they would. Before the episode ended, viewers could see Will, still alive.

"Agents of S.H.I.E.L.D." airs Tuesdays at 9 p.m. EST on ABC.