"Marvel's Agents of S.H.I.E.L.D" Season 1 has taken to another short break before it returns in the spring of 2014. Fans will have to wait until start of Feb. 2014 for their favorite show to make a comeback. After two sensational episodes aired after its winter hiatus, fans are now anticipating more action and thrill. Keeping in mind their fans' rising expectations, show runners have decided to introduce some iconic characters to the show and are in process of developing a grand season finale. Here are few things to expect in Marvel's Agents of S.H.I.E.L.D. Season 1 Episode 13. (Spoilers Ahead!)

'Marvel's Agents of S.H.I.E.L.D.' Season 1 Episode 13 Spoilers: Iconic Characters to Debut-Deathlok , Loralei and Lady Sif

Marvel's Agents of S.H.I.E.L.D. Season 1 Episode 12 titled "Seeds" saw the entry of super villain Donnie Gill and awakening of Mike Peterson. Adding to the list of exciting entries are some of more iconic characters like Deathlok, Loralei ad Lady Sif from Marvel's universe.

According to the recent spoilers' report of Marvel's Agents of S.H.I.E.L.D. Season 1, fans will be surprised to know that Mike Peterson is actually Marvel's Deathlok. As showed in last aired episode, Mike Peterson lost his leg but gained an eye that asked him to "Stand by for further instructions." Following which, he will be transformed into Deathlok. The transformation will take place in Marvel's Agents of S.H.I.E.L.D. Season 1 Episode 13 T.R.A.C.K.S.

Mike Peterson was believed to have died due to severe burns that he suffered in an explosion. But after losing his leg he will now become a cyborg and gain some new mechanical powers, against his will.

Along with Deathlok, gaining an entry into the universe of agents of S.H.I.E.L.D. is the sister of Thor villain Loralei and Lady Sif. Loralei who belongs to planet Asgard, has the power to enchant men and their minds with her beauty. As played by Elene Satine, Loralei will put up a battle against Lady Sif portrayed by "Thor" movie actress Jamie Alexander.

For more spoilers, in Marvel's Marvel's Agents of S.H.I.E.L.D. Season 1 Episode 13 T.R.A.C.K.S., Phil Coulson's team will head to unfurl the mystery of Clairvoyant. They will take a mystery train which is moving in the direction of death.

Also appearing on the upcoming episode is the legendary comic book writer and Editor Stan Lee. In a report by Hollywood Reporter, Stan Lee confirmed his guest role in the returning episode of the show. Not much is revealed about Stan Lee's character, but the report describes his character to play a "big role," in the show.

'Marvel's Agents of S.H.I.E.L.D.' Season 1 Episode 13 T.R.A.C.K.S. Airdate

Marvel's Agents of S.H.I.E.L.D. Season 1 took to winter hiatus after unveiling the two biggest mysteries: Phil Coulson's mystery of death and resurrection and Skye's mystery of past. And the agents are now headed to unveil yet another mystery. And standing in their way is Donnie gill, Mike Peterson and Loralei. How will they get past these super villains and iconic characters from Marvel Universe obstructing them in their mission?

Find answers to all your questions when the show returns on Feb. 4, 2014 with Marvel's Agents of S.H.I.E.L.D. Season 1 Episode 13 T.R.A.C.K.S. on ABC.

For more spoilers on 'Marvel's Agents of S.H.I.E.L.D.' Season 1 Episode 13 T.R.A.C.K.S., read below:

Marvel's Agents of S.H.I.E.L.D. Season 1 Episode 13 Spoilers: Team Unveils the Mystery of Clairvoyant, 'Thor's' Lady Sif to Enter