When Marvel's Agents of S.H.I.E.L.D. was first announced, many fans thought the series would go the same route as Arrow, which has introduced a multitude of DC Comics characters throughout their two-season run. While they haven't been as prolific as their CW Network counterpart, the ABC series has introduced comic book characters such as Gravitron (Ian Hart), Blizzard (Dylan Minnette) and Victoria Hand (Saffron Burrows), along with a few familiar faces from the Marvel theatrical universe like Cobie Smulders' Agent Maria Hill and Samuel L. Jackson as Nick Fury.

Today, we have word that the series is bringing in two more characters from the Marvel canon, Deathlok and Lorelei in the second half of Season 1.

However, Deathlok has already been introduced to the fans of the series, with executive producer Jeph Loeb revealing that J. August Richards' Mike Peterson, who appeared in the Pilot episode and "The Bridge", will turn into the cyborg Deathlok. Here's what the executive producer had to say in a brief statement.

"We've been leaving breadcrumbs along the way. This is a major Marvel character appearing on TV, on film for the first time."

In the Marvel comics, there have been several characters who became Deathlok, the first of which is Luther Manning, a soldier who was killed and reanimated as Deathlok by Simon Ryker. The characters who become Deathlok in the comics, traditionally, are men who have died, only to be rebuilt with robotic enhancements. At the end of "The Bridge", Mike Peterson survived an explosion on the bridge, although he was burned badly and lost his right leg.

Lorelei will be portrayed by Elena Satine, and she will square off against Lady Sif, played by Thor: The Dark World's Jaimie Alexander. We reported last week that Jaimie Alexander is guest starring in the 15th episode this season. Although it isn't quite known what brings Asgardians Lorelei and Sif to Earth, they have always had a contentious relationship in the Marvel comic books, so it will be interesting to see how this episode plays out.

Executive producer Jeffrey Bell also compared the second half of this season to the "back half of the movie." Jeph Loeb also added the following statement.

"We set it up, now we're going to pull the trigger."

Marvel's Agents of S.H.I.E.L.D. returns Tuesday, February 4 at 8 PM ET on ABC with "T.R.A.C.K.S.", an episode which will feature Marvel icon Stan Lee in a guest-starring appearance.