The Time Everything Changed - S1.E12

Romy's friend, Molly, ingratiates herself more and more into Romy's life, seemingly stealing her friends and honing in on her acting class. Romy has had just about enough, but Sarah and Maguire find themselves becoming better and better friends with her. Then, the unimaginable happens - Molly is murdered during a mugging and Sarah, Romy and Maguire are overwhelmed with grief and guilt. Maguire feels that the hospital was negligent; Sarah is panicked about her own safety in the city; and, Romy is so emotionally shattered that she packs up her belongings and moves back home.