Below Deck is back and according to one cast member, it will be the most surprising season yet.

In a new interview, Captain Lee Rosbach is speaking out about the upcoming episodes of the Bravo reality show.

"The best way for me to put it would be: I don't surprise easily, and this season surprised me – in a good way," Captain Rosbach told People Magazine on Tuesday. "There are some things that definitely get my attention. I'm a pretty easy read, I kind of wear everything out on my sleeve, so you can tell by my expressions when I'm caught off guard or caught by surprise."

As fans may have seen in the sneak peek at the new season, Kelley Johnson finds herself in the midst of tensions with her co-stars just one day into their charter -- and Captain Rosbach isn't happy. However, he hopes that the season will show a positive progression in their relationship.

"A lot can happen in a lot of years and Kelley had a maturation process to go through, and I think that when everybody gets done viewing this season they'll see whether that transpired or it didn't."

In addition to the return of Captain Rosbach and Johnson, fans will be reunited with chef Ben Robinson and Chief Stewardess Kate Chastain when the show returns. Meanwhile, the rest of the crew is new.

"I like when there's a mix. I really enjoy the challenges it provides and sometimes it's a breath of fresh air where you get new blood so to speak and sometimes it works and sometimes it doesn't so you just kind of take it as it comes," the Captain explained.

For more of Captain Lee Rosbach and the crew, tune into the Below Deck season 4 premiere tonight, Sept. 6, at 9 p.m. on Bravo and check out a sneak peek at the upcoming new episodes below.

Tags: Below Deck Bravo Reality TV