New details have emerged on the character Benjamin Bratt will portray this season on Private Practice.

"He's a fertility doctor," Bratt tells TV Guide. "And not just a fertility doctor, but someone who is quite accomplished and up to speed with cutting-edge technology and procedures."

Addison met Bratt's Jake on the May finale, of course, but she had no idea at the time what he did for a living.

Looking ahead, the veteran actor previews:

"As their relationship evolves over the season, it'll be complicated in a good way, because what we've already discovered about them is that there's a very strong, undeniable physical attraction. With her renewed commitment to Sam, and revealing who he is and what he does, and how that brings him into their sphere, things have to be kept secret."

Private Practice returns on September 29 with an episode titled... find out NOW!