Overview:Brandon and Kelly recognize a hooker on a downtown street as Dylan's sister Erica. They call Brenda and learn that Erica vanished after following a boyfriend from Hawaii to Los Angeles. Brandon pays a male prostitute to lead them to Erica, and he and Kelly move her into the house. After convincing Valerie that she can be trusted alone, Erica disappears with all of the gang's valuables. David turns to a loan shark for help with his money problems. Donna discovers that David forged her name on a check. Torn apart by David's deceitful actions, she dumps him and throws him out of the apartment. Steve feels uncomfortable when Zach tricks him into participating in a father-son soccer game. Steve apologizes to Carly for overreacting, and they spend the night together. A woman whom Steve dated over the summer shows up and claims that she is pregnant with his child. Noah refuses to accept Val's apology and resume their relationship. He gets very drunk and is arrested in a bar fight. Brandon bai