Brandon struggles with a major medical decision. Stef seeks answers on Mike's whereabouts.

While Lena and Stef are away on a babymoon, the kids throw a party that gets out of hand.

Callie asks her biological father for a favor; Connor is pressured to end his friendship with Jude.

Stef and Lena take different sides on several issues; Brandon is invited to attend a music program.

Callie confronts demons from the past; Mariana worries about the future of Ana's baby; Jude deals with the repercussions of his poor decision; Lena discusses her domestic troubles with Monte.

Callie meets her grandfather, which gives her a new perspective on Robert. Meanwhile, Mariana gets ready for a crucial dance-team showdown; and Jude stands up for a friend.

As part of their annual tradition, Stef and Lena have Mike over for Father's Day brunch. Jude surprises everyone, especially Callie, by inviting his biological father, Donald, to join them. Callie spends Father's Day with the Quinns and hears some surprising news. Frustrated by his situation at Idyllwild, Brandon let's off some steam with his classmates.

Amid tensions in their own relationship, Stef and Lena host a 40th anniversary party for Lena’s parents.