Sons of Anarchy will return with its seventh and final season on 9 September with an extended episode lasting 1 hour, 45 minutes.

The series' creator Kurt Sutter and actor Charlie Hunnam, who plays Jax, were part of the show's panel at the Television Critics Association's press tour in California, on Monday and spoke about the upcoming season - teasing the premiere episode plot details and revealing updates on the show's ending (via Entertainment Weekly).

Sons of Anarchy Season 7 Episode 1 will start 10 days after the Season 6 finale, and Jax is on a mission to avenge Tara's death:

"Jax is in a very schizophrenic state," said Hunnam. "He's obviously very sad and vulnerable and kind of broken, but there's a huge amount of vengeance and anger in his heart ... He knows what he wants to do, and that's where all his energy is going. He can't get away from the fact that the love of his life has been taken from him," he said.

"Jax's singular purpose for most of the season is to avenge her death," added Sutter.

Sutter also revealed that the eagerly-awaited series finale is still being developed and that he doesn't have an ending in place yet:

"Considering I'm a week-and-a-half behind writing episode 7, it could all change," Sutter said, when asked about the series' ending.

"I've always had a sense of where I wanted it to go, and I come in each season with a blueprint with the big arcs and mile markers. And I've learned over seven seasons, the looser I grip that idea the better the seasons are. And this season isn't any different. I came in with how I wanted the season to end ... but things change. It's always been heading in the same direction, but the way I'm getting there continues to change," he said.

Sutter also spoke about the possibility of doing a Sons of Anarchy prequel series suggesting that while he's not closed to the idea, it would probably be on the lines of a 10-episode miniseries model. "I don't think it's a full blown five-season series," he said.

Check out the Sons of Anarchy Season 7 Teaser Trailer: