At the news of Phoebe (Beau Garrett) getting her GED, the girlfriends throw her a '90s themed prom sponsored by SheShe. Abby (Lisa Edelstein) goes on a second date with Dr. Harris (Mark Valley). Jo's (Alanna Ubach) ex-husband, Rob Frumpkis (Maury Sterling), comes to Los Angeles to spend time with his daughter.