Agents Of S.H.I.E.L.D. Season 3 Premiere: Laws Of Nature

Marvel's Agents of S.H.I.E.L.D.returns tonight for its third season on ABC. It's a return that fans eager to learn the fate of Agent Simmons and the effect the Terrigen fish oil has had on the planet have been waiting for.

In the Season 3 premiere episode, "Laws of Nature," when Coulson and the team discover a new Inhuman, S.H.I.E.L.D. comes face to face with another organization searching for powered people. And still reeling from Simmons' dramatic disappearance, Fitz goes to extreme lengths to try to learn how to get her back.

Check out three preview videos for the episode below.

You can also see several preview images from the episode in the gallery below.

The Marvel's Agents of S.H.I.E.L.D. Season 3 premiere, "Laws of Nature," airs Tuesday, Sept. 30 at 9 p.m. ET on ABC.