Who can you trust on Agents of SHIELD? Nobody, apparently.

Clairvoyant & Centipede To Feature In 'Captain America 2'?

The walls are crumbling down around Agent Coulson (Clark Gregg) and his team, and suspicion over who Clarivoyent really is - and who is working for the psychic villain - will spill across Captain America: The Winter Soldier and back into Agents of SHIELD for "Turn, Turn, Turn."

Victoria Hand (Saffron Burrows) exposed herself as a villainous traitor at the end of "End of the Beginning," but there may be one more baddie onboard the Bus. Episode stills for "Turn, Turn, Turn" depict a lot of wild gun pointing, and one extremely acrimonious look between Coulson and a cordoned off Fitz (Iain De Caestecker).

'Captain America 2' Will 'Heavily Affect' 'Agents of SHIELD' Characters, Chloe Bennet Dishes On Crossover

Could the British engineer be suspect? A new promo shows Simmons (Elizabeth Henstridge) defending someone's honor against Agents Hand's accusations, but whom she is referring to remains unknown (see video below).

Agent John Garrett (Bill Paxton) sums it up best when he tells Coulson, "This is a battle for SHIELD's soul, and were on the frontline."

Fans were given a glimpse of The Winter Soldier at the end of Tuesday's episode, Gregg took to Twitter on Tuesday night to warn fans that they need to check out the Captain America flick this weekend to truly understands next week's episode.

"Thanks for watching #AgentsofSHIELD with us. See #CaptainAmericaTheWinterSoldier this weekend to be ready for next week #Itsallconnected," Gregg said.

Agents of SHIELD airs Tuesdays at 8 p.m. ET on ABC.