Actress Adrienne Palicki arrives for an opening night gala during CinemaCon
Actress Adrienne Palicki arrives for an opening night gala during CinemaCon at Caesars Palace in Las Vegas, Nevada, April 23, 2012. CinemaCon is a trade show and official convention for the National Association of Theatre Owners (NATO). Reuters/Steve Marcus

"Marvel's Agents Of S.H.I.E.L.D." Season 2 is set to air a thrilling segment on Tuesday, Oct. 21, 2014. Episode 5 will see the entry of some exciting new characters from Marvel Universe and a revelation of an agent's past. In the upcoming episode, Phil Coulson and his team of crime-fighting agents take over the new challenges and a new enemy. Meanwhile, an agent faces the danger of being exposed as a sleuth. Here are few spoilers from the upcoming episode titled "A Hen in the Wolf House." Read on to find out what happens next. Also, find out where to watch it online via live stream. [Warning: Spoilers Alert!]

The second instalment of "Marvel's Agents of S.H.I.E.L.D." saw the introduction of new characters including Lance Hunter, Sunil Bakshi, Peggy Carter and more. Fans must brace themselves for another exciting entry of a Marvel superhero.

Last week, fans saw Simmons working as an undercover agent at Hydra. At the same time, May and Phil Coulson pursued a personal mission to search the painting with a mystical text that holds the answers they are looking for. The episode focused mainly on May and Coulson's undercover mission that involved some action and light moments.

Moving on to the next episode, ABC has released a synopsis teasing spoilers on Season 2 Episode 5 "A Hen in the Wolf House" on its official site. According to the report, the segment will see Simmons' undercover mission take an unexpected turn for her. Things may not go as planned when she comes face to face with dynamic, authoritative and powerful Security Chief for HYDRA who calls herself Bobbi Morse. Marvel fans would recognise her as the alter ego of the character Mockingbird.

Adrienne Palicki's Bobbi Morse is investigating a security breach and it seems she is not far from finding out the traitor. And when she does, Phil Coulson and his team are forced to stand up against her.

Furthermore, the episode will delve a little into Skye's past. Her father compels Raina to help him get together with his daughter.

Meanwhile, the network has released an exciting promo video giving a glimpse at Episode 5 "A Hen in the Wolf House" (as published by Television Promos on YouTube.com). The trailer shows Bobbi Morse questioning Simmons' loyalty. Later, it shows Simmons trying to escape HYDRA's facility as Morse announces, "We have a mole, ladies and gentlemen." Furthermore, Raina comes to meet Coulson, telling him that she plans to take Skye. However, she mentions some mysterious connection between Skye's father and Simmons' life.

"Marvel's Agents of S.H.I.E.L.D." stars Clark Gregg as Phil Coulson, Brett Dalton as Grant Ward, Chloe Bennett as Skye, Ming-Na Wen as Melinda May, Elizabeth Henstridge as Jemma Simmons and more. Season 2 Episode 5 "A Hen in the Wolf House" airs Oct. 20, 2014 at 9:00 p.m. ET on ABC.

Videos: Marvel's Agents of SHIELD 2x05 Promo "A Hen in the Wolf House" (HD)

Credit: YouTube.com/Television Promos

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

'Marvel's Agents Of S.H.I.E.L.D.' Season 2 Episode 3 Spoilers: Supervillain Returns And A Possible Traitor Revealed Plus Where To Watch Online, Live Stream

'Marvel's Agents Of S.H.I.E.L.D.' Season 2 Episode 4 Spoilers: What Happens Next Plus Where To Watch Online, Live Stream 'Face My Enemy'