Dale Waddington

The staff tries to deal with physical and emotional trauma in the wake of the vengeful gunman's deadly rampage; Derek makes a spontaneous decision to resign as chief and return to surgery.

Amelia arrives at Seattle Grace to beg Derek to help with the gliosarcoma case; Cristina and Owen have heated arguments during marriage counselling; Alex realises he needs to improve his people skills in order to be a good doctor.

Residents of Wisteria Lane are faced with deadly threats; Susan realises she is about to lose someone she loves; Katherine Mayfair's secrets are revealed.

Alan befriends a gay man at a single parent meeting, but he makes both Alan and Charlie doubt their sexual identities.

Mike Delfino remembers scenes from his past; problems at Scavo's Pizzeria cause conflict in Lynette and Tom's relationship; Orson reveals his hidden past to Bree.

Rex Van De Kamp narrates the happenings on Wisteria Lane; Edie gets an unexpected visitor from her past; an unanticipated pregnancy creates complications.