agents of shield
Watch Agents of Shield season 3 premiere live online ABC

Marvel's Agents of Shield returns this Tuesday, 29 September, with its third season which is all set to delve deeper into The Inhumans plotline along with exploring Marvel's Secret Warriors story arc. ABC has released the official synopses for the first three episodes of the new season and it looks like the show is going full-throttle into superhero mode.

According to the synopsis for episode 1 titled Laws of Nature, Coulson and the team discover a new Inhuman and Shield encounters another organisation searching for powered people. Also, Fitz, still distraught about Simmons' disappearance, goes to extremes to learn how to get her back.

Actor Clark Gregg, who plays Coulson, spoke to Entertainment Weekly ahead of the season 3 premiere and shed some light on what the characters are up to in the new episodes. "Where we left off last year, his current project is to sign up Skye in a quasi-leadership capacity to put together a team called Secret Warriors, which is comprised primarily of people with powers — Inhumans, for the most part. Although, I wouldn't be surprised if we see some people... like Deathlok (J. August Richards) or somebody, show up at some point. All allies are welcome to that thing, I suspect," the actor said.

Agents of Shield season 3, episode 2 synopsis

Meanwhile, the synopsis of episode 2 teases the appearance of an "Asgardian" and fans are quite sure that it could be Lady Sif who is a recurring guest character on the show. Check out the official description for the episode titled Purpose in the Machine, below:

"Fitz and the team enlist the aid of an Asgardian to unlock the secrets of the ancient monolith that swallowed Simmons, and Agent May is at a crossroads in her personal and professional life."

Agents of Shield season 3, episode 3 synopsis

"Daisy, Mack and Coulson race to protect Lincoln as Rosalind's team hunts down the Inhuman in their quest for powered people. Meanwhile, Hunter proves that there is no line that he will not cross to exact his revenge against Ward and Hydra."

Where to watch premiere episode live online - Marvel's Agents of Shield season 3 premieres this Tuesday at 9pm ET on ABC. Click here to watch episode 1 live stream online.