Despite their chaotic personal lives, the women decide to follow through with the big dinner party the late Mary Alice had planned to host.

Edie organises a neighbourhood search for Mrs Huber, just as her sister arrives on Wisteria Lane; Bree agrees to a separation and asks an attractive pharmacist on a date.

Lynette finds out who started the fire at Rick's restaurant; Bree gives Orson an ultimatum; Susan reconnects with her ex-husband Karl.

Jack Bauer (Kiefer Sutherland) and his team of agents uncover a plot to assassinate a presidential candidate.

Lynette discovers the softer side of her son Porter; Gaby tries to downplay her decline in social stature; the men in Susan's life meet; Bree feels the pressure of balancing motherhood and a career.

Gabrielle decides to get back into modelling; Lynette is suspicious of her new neighbour; Bree meets her antagonistic mother-in-law.

Old war comrade of Mal's and Zoe's mails his corpse to them and leaves a note asking them to deliver him to his family.

Gibbs makes shocking discoveries while investigating a respected colleague's murder.

The murder of a woman leads Detectives Benson and Stabler to reopen an old but similar investigation from 20 years earlier.

Kimberly and Janet find themselves in danger; Jack obtains a key card that could lead to the terrorist organisation.

Jack tries to determine why an airliner exploded over the Mojave Desert, while he continues searching for the assassin who made an attempt on Sen. Palmer's life.

Strong leads emerge in both New York and Atlantic City, during the investigation into the murder of an Atlantic City casino owner at an abandoned warehouse.

Jack takes one of Gaines' colleagues on a wild ride in order to glean clues about his family's whereabouts; Sen. Palmer learns of a possible conspiracy.

Jack suspects someone at CTU might be involved in the assassination attempt; Palmer decides to make an ill-advised public appearance.

After the rescue, Jack is interrogated at CTU, while an assassin stalks Teri and Kim at the hospital.

Jack turns the tables on Gaines; Nina and Tony discover that the plot to assassinate the senator goes deeper than they realised; Sen. Palmer receives surprising news.

Jack closes in on Teri and Kimberly's location as things turn violent at the compound; Palmer realises how far his campaign backers will go to protect him.

Jack believes Kimberly has been kidnapped; Palmer learns a family secret that could hurt his campaign; Jane struggles to stay alive.

The Lightman Group discovers that a governor's staffer who was killed during a rally right before the election may have been the target all along to protect a cover-up; Clara might be lying to protect somebody on the inside.

Kate meets Sergei, a handsome and mysterious guest at a political event, and is irresistibly drawn to him.