Mercedes Kastner

Living together strains Kelly and Brandon's relationship. Donna lets David move in—on strict terms. In Hawaii, the gang meets Noah, who helps Donna and later saves David during a hike.

Nina inspires Elliott's mom to start her life over again; Maya and Jack accidentally kill Finch's prized cat.

Steve and David patronize a new "sex shop" that opens in Beverly Hills. A misunderstanding causes David and Valerie to fear that they are having problems with their sex life.

Katie moves forward with David. A nannycam catches Matt and Kelly making love. Steve goes "Y2Krazy," ignoring and avoiding a trip with Janet.

Walker teams up with his friend Soldier and his dog, Lucky, to search for an orphaned brother and sister who are being hunted down by ruthless criminals whom the children witnessed committing a murder.