• From L-R: Cast members Clark Gregg, Ming-Na Wen, Brett Dalton, Chloe Bennet, Iain De Caestecker and Elizabeth Henstridge participate in a panel for "Marvel's Agents of S.H.I.E.L.D." during the Disney ABC Television Group sessions at the Television Critics

From L-R: Cast members Clark Gregg, Ming-Na Wen, Brett Dalton, Chloe Bennet, Iain De Caestecker and Elizabeth Henstridge participate in a panel for "Marvel's Agents of S.H.I.E.L.D." during the Disney ABC Television Group sessions at the Television Critics (Photo : REUTERS/Phil McCarten)

"Marvel's Agents of S.H.I.E.L.D." Season 2 features a two-part finale segment on Tuesday, May 12, 2015. The Episode 21 and 22 are titled "S.O.S" and revolves around the battle between Inhumans and S.H.I E.L.D. It also reveals Inhumans' true motives. Meanwhile, the show digs deeper into the impact of the war between the two enemies. and how it changes everything for Coulson's team. Here are few spoilers for the "Marvel's Agents of S.H.I.E.L.D." Season 2 finale. Read on to find out what happens next.

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[Spoiler alert! This article contains spoilers for "Marvel's Agents of S.H.I.E.L.D." Season 2 Episode 21, 22 "S.O.S Part One" and "S.O.S. Part Two." Please do not read further if you don't want to know more about it.]

Following the shocking events of Episode 20, the war between Inhumans and S.H.I.E.L.D. is inevitable. Jiaying sparked off a war with Coulson after killing Gonzalez. Inhumans and S.H.I.E.L.D. will finally battle it out in the finale.

According to ABC's official synopsis for "S.O.S. Part One" and "S.O.S. Part Two," S.H.I.E.L.D. will risk everything to protect themselves as the war breaks out. Meanwhile, agents' allegiance is put to test.

The outcome of the war compels the team members to make some traumatizing sacrifices. This leads to a change in the relationships forever. It is said things will never be the same for S.H.I.E.L.D. Entertainment publication IGN speculates that these "sacrifices" may mean death of a team member or eliminating Skye, who happens to be Inhuman, from the organisation.

A promo video (via Youtube.com/ Marvel Entertainment) for "Marvel's Agents of S.H.I.E.L.D." Season 2 finale shows how Skye is affected by the war between his family and Coulson. She is compelled to choose on whose side she is. Another promo video (via YouTube.com/Television Promos) for Episode 21 and 22 gives the glimpse of events of the final segment. Scroll down to watch the videos.

Meanwhile, fans can expect to see some big revelations in "S.O.S." According to TV Line, the Episode 21 will answer some burning questions such as what were the contents of vials found on Cal. The show will also delve deeper into Ward's storyline. The upcoming episode will reportedly reveal what "Ward wants from Bobbi." There will also be "two sizable hand-to-hand combat sequences." It will also reveal the "'key' to saving the Inhumans from 'death and destruction.'"

Some characters will also undergo major transformations, according to Hypable. According to the aforementioned publication there will be at least two characters undergoing a change and Raina will make a prophecy in the "Marvel's Agents of S.H.I.E.L.D." Season 2 finale. Also the show will deal with an "old mystery" in the final segment.

Speaking to Zap2it.com, executive producer Jeffrey Bell reveals that "for several people things will be radically different" after the season finale. "There are big personal costs paid by most of them," EP said.

 "Marvel's Agents of S.H.I.E.L.D." Season 2 Finale (Episode 21, 22) "S.O.S Part One" and S.O.S. "Part two" air May 12, 2015 at 9:00 pm on ABC. Stay tuned for more updates and spoilers.

 Marvel's Agents of SHIELD 2x21 & 2x22 "S.O.S." Promo (HD) Season Finale

Credits: YouTube.com/Television Promos

Marvel's Agents of S.H.I.E.L.D. Season 2 Finale - Clip 1

Credits: YouTube.com/Marvel Entertainment