"Marvel's Agents of S.H.I.E.L.D." Episode 19 promises to bring more action and drama for viewers to witness. Treachery within their organization has left S.H.I.E.L.D. shattered and Phil Coulson's team struggling to keep it together. What will happen when a new threat arrives which has the power to wipe out the S.H.I.E.L.D. and those close to agents? In the all new episode, agents and Phil Coulson will come face to face with Marvel's super villain Marcus Daniels, aka Blackout, and other challenges. Here are spoilers from "Marvel's Agents of S.H.I.E.L.D." Episode 19 titled "Only Light in the Darkness." Read on to find out what happens next. [Warning: Spoilers Alert!]

This article contains major spoilers on "Marvel's Agents of S.H.I.E.L.D." Season 1 Episode 19 titled "Only Light in the Darkness." Read only if you want to learn more about the episode.

In the last few episodes of "Marvel's Agents of S.H.I.E.L.D.," Phil Coulson and his team experienced betrayal and major fallouts, leaving them with no one to trust and believe. With HYDRA coming to power, S.H.I.E.L.D. is completely scattered and agents are totally helpless. While dealing with issues eating up S.H.I.E.L.D. internally, agents will also have to deal with a new terror.

Synopsis of "Marvel's Agents of S.H.I.E.L.D." Episode 19 titled "The Only Light in the Darkness" (as published by Hypable) suggests that in the midst of all the chaos, Agent Phil Coulson "races to save the life of his one true love." As "The Cellist" mystery that began in "Marvel's The Avengers" is finally unveiled, the life of Coulson's lover is threatened.

This week, viewers will finally meet Coulson's girlfriend, Audrey, as portrayed by Amy Acker. She is the cellist and Coulson's love interest, from the time before his death. Along with Audrey, viewers will meet Marvel's Blackout who has links to Audrey's past, according to spoilers by Fan Sided.

A promo video (below) of episode 19 shows the arrival of Marcus Daniels as portrayed by Patrick Brennan. Blackout who has the ability to manipulate darkforce can be seen asking for a ride from a man at the dock to Portland where Audrey lives. When the man denies helping him, Blackout shuts down his vehicle with his powers. When the man asks him how he did it, he kills him and leaves the place in his car. Will he kill Audrey as well?

Another FanSided spoilers report suggests that the team will have to go through the lie detector test that has been designed by S.H.I.E.L.D. director Nick Fury himself.

Also, Skye will find out Agent Ward's nasty secret that will end their relationship, according to KDramaStars.com.

For those who are eager, they can watch the promo videos below and view the photos from the next episode by clicking HERE as published by Hypable.

"Marvel's Agents of S.H.I.E.L.D." features Clark Gregg as Agent Phil Coulson, Iain De Caestecker as Agent Leo Fitz, Brett Dalton as Agent Grant Ward, Ming-Na Wen as Agent Melinda May, Elizabeth Henstridge as Agent Jemma Simmons and Chloe Bennet as Skye.

"Marvel's Agents of S.H.I.E.L.D." Episode 19 "The Only Light in the Darkness," will see Patton Oswalt as Eric Koenig, Bill Paxton as Agent Garrett, Adrian Pasdar as Colonel Talbot, Patrick Brennan as Marcus Daniels, David Conrad as Ian Quinn, Amy Acker as Audrey and more as guest stars. The episode is directed by Vincent Misiano and written by Monica Owusu-Breen. "The Only Light in the Darkness," airs April 22, 2014 at 9 pm ET on ABC.

(Credit: YouTube/TV Promo HD)

(Credit: YouTube/TV PromoHD)

For more spoilers from 'Marvel's Agents of S.H.I.E.L.D.' Season 1, read below:

'Marvel's Agents of S.H.I.E.L.D.' Episode 18 'Providence' Spoilers: Everything to Know About 'S.H.I.E.L.D.,' 'Captain America' Crossover; Agents Discover S.H.I.E.L.D.'s 'Most Dangerous Secrets' [VIDEO]

'Marvel's Agents of S.H.I.E.L.D.' Episode 17 Spoilers, Preview: Everything to Know About 'Explosive' and 'Game-Changing' Segment 'Turn Turn Turn' [Watch Video]

'Marvel's Agents of S.H.I.E.L.D.' Episode 16 Spoilers: 5 Things to Watch Out for in 'End of the Beginning' Plus 'Captain America 2' Crossover