Lindsay (recurring guest star Shannon Lucio) and Ryan grapple with their new relationship: Is Lindsay Ryan's step-aunt or his girlfriend? Meanwhile, Summer meets Zach's (recurring guest star Michael Cassidy) family, and it doesn't go so well. In the end it's an anniversary to remember as Sandy surprises Kirsten with a serenade at the Bait Shop. But Marissa ends up alone as D.J. (recurring guest star Nicholas Gonzalez) leaves Newport Beach.