• Marvel's Agents of S.H.I.E.L.D. Season 3 Premieres Sept. 29, 2015 on ABC.

Marvel's Agents of S.H.I.E.L.D. Season 3 Premieres Sept. 29, 2015 on ABC. (Photo : Facebook/Agents of S.H.I.E.L.D./ ABC)

After a long hiatus, "Marvel's Agents of S.H.I.E.L.D." returns with its brand new Season 3. Premiering on Sept. 29, 2015, Episode 1 is titled "Laws of Nature." The season-opener unveils Coulson and his team's newest rival and their new challenge. Check out the spoilers for premiere segment of ABC's Marvel show. Also, learn what happens in Episode 2 and where to watch the series online through live streaming.

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[Spoiler alert! This article contains spoilers for 'Marvel's Agents of S.H.I.E.L.D.' Season 3. Read on only if you want to know more about it.]

'Marvel's Agents of S.H.I.E.L.D.' Season 3 Episode 1 spoilers indicate at an exciting face-off. According to the synopsis for "Laws of Nature" on ABC's official website, Coulson and Agent Daisy Johnson/Skye return to the duty of leading the crime-fighting agency S.H.I.E.L.D. Still reeling from the events of the battle with Jiaying and other inhumans, the agents search for more inhumans.

Coulson and his agents come face to face to with a new inhuman and realise they are not the only organisation looking for the superhumans. Meanwhile, Fitz is determined to bring Simmons back. He searches for a way to reach Simmons.

The network has released promo videos for 'Marvel's Agents of S.H.I.E.L.D.' Season 3 teasing the events of Episode 1 "Laws of Nature." One sneak peek video features first few minutes of the premiere segment, introducing the new Inhuman Joey. Another trailer sees Mack and Skye trying to get back Lincoln. Scroll down to watch the promos.

Episode 2 of 'Marvel's Agents of S.H.I.E.L.D.' Season 3 is titled "Purpose in the Machine." Fans must brace themselves for a "Thor" crossover of sorts as the segment will feature an Asgardian as the ancient secrets of the monolith are uncovered.

According to ABC's synopsis, Fitz approaches an Asgardian to help him unveil the secrets of the monolith that consumed Simmons. This is the only way Fitz could bring back Simmons. Meanwhile, Agent May has some tough decisions to make that could impact her personal and professional life. Fans can take a glimpse at the events of Episode 2 of 'Marvel's Agents of S.H.I.E.L.D.' Season 3 via photos published on Den of Geek.

"Marvel's Agents of S.H.I.E.L.D.' Season 3 Episode 1 airs Sept. 29 and Episode 2 airs Oct. 6 on ABC. Fans can also watch the premiere and other episodes online via live stream on abc.com. Stay tuned for more spoilers and updates.