The NCIS team must work on an assignment against a terrorist group without Gibbs, who is still recovering from the explosion. Gibbs has to fight with memory loss, while he's visited by his mentor and his former boss. His help is needed, especially when the team discovers that Gibbs is the only person who has information about the terrorists' plans, so he needs to retrieve his memory before the terrorists attack.
Chloe and Jimmy have unexpected arrivals at their ceremony. Oliver is shocked to see Lana after expecting to find Lex. Lois and Clark begin to fall for each other.
When Peter gets a pet parrot, he begins acting like a pirate. Peter accidentally kills the bird after raising hell through all of Quahog. Meanwhile, when Brian is visiting the vet, Chris falls in love with the intern, Anna.
Nancy must face the music when the DEA calls her in for questioning.
Wendy and The Middleman work to contain a trout-eating zombie outbreak. Writer: Andy Reaser Director: Allan Kroeker Guest star: Sherry Mattson (!!!! Promo Girl), Tina Joy Manera (!!!! Promo Girl), Melanie Hawkins (Bonnie Blue), Timothy Josefy (Fishmonger), Joshua Levine (Dave), Michele Nordin (Heidi), Drew Tyler Bell (Pip), Al Damji (Rod Argent), Todd Stashwick (Head Guard/Mr. White), George Williams (Deputy Commissioner) Wendy and The Middleman work to contain a trout-eating zombie outbreak. Writer: Andy Reaser Director: Allan Kroeker Guest star: Sherry Mattson (!!!! Promo Girl), Tina Joy Manera ...
In the season finale, Don and Charlie work together on a case that ends up with them going head to head about their personal beliefs, and one team member will walk away forever.
Monk must go to the hospital but soon becomes involved in a murder investigation.
First aired: 2/23/2007 Production Code: 517 Monk must catch a mysterious serial killer, but he may have more trouble with a federal agent who prefers technology to deduction.
Disher retires to run a farm that he inherits from a dead uncle. But when he suspect foul play in his relative's death, he calls in Monk.
A radio host is suspected of murder, but Monk is confronted with a perfect alibi: the man was on the air when the murder occurred
When a wealthy couple is killed, Monk poses as a butler to investigate. Along the way, Monk discovers a fear of frogs and realizes that his obsessive-compulsiveness serves him well as a manservant.
Monk is surprised to find he's made a friend, a normal everyday guy named Hal. Monk is overwhelmed by having an actual friend, but Natalie has her suspicions that Hal is up to something.
Monk becomes involved in a murder plot when a reclusive millionnaire suffering from leprosy hires him to do a job.
Monk ends up going on a cross-country road trip with his long-missing dad, a truck driver.
Monk goes to a rock concert to look for Captain Stottlemeyer's son. While there Monk investigates a murder.
When Dr. Kroger's cleaning lady gets murdered, he decides to retire. When Monk can't bear to find a new therapist, he decides to solve the crime.