Be warned, if you haven't seen Captain America: The Winter Soldier or last night's episode of Marvel's Agents of S.H.I.E.L.D., "Turn, Turn, Turn", there will be massive SPOILERS in the video below.

Fans who tuned in last night learned that the events of the Marvel Phase Two sequel carried over to this ABC series, where it is revealed that Hydra has been infiltrating S.H.I.E.L.D. this whole time, and Agent Ward (Brett Dalton) and Agent Garrett (Bill Paxton) have been working for the enemy all along. Watch as cast members Clark Gregg, Ming-Na Wen, Brett Dalton, Chloe Bennet, Iain De Caestecker and Elizabeth Henstridge talk about how the whole dynamic of the show shifts after this episode, then read on for more information about a returning guest star.

TV Line is reporting that Cobie Smulders is returning as Maria Hill in the April 29 episode "Nothing Personal". Fans who watched Captain America: The Winter Soldier know that Hill explores a new career opportunity towards the end, although it isn't known how her character will fit into the story line.

She is said to have a large role in the episode, which kicks off the show's May sweeps run, which features both Hill and Clark Gregg's Agent Coulson teaming up for some action-packed scenes. The actress previously appeared as Hill in the Pilot episode back in September.

The news comes just a few days after our report that Samuel L. Jackson will guest star as Nick Fury in the season finale, set to air on Tuesday, May 13.