Jane and the CBI try to determine who would have reason to kill a popular English teacher. Meanwhile, Cho and Summer hide their relationship from Lisbon, and Rigsby nervously awaits a special delivery.
Lois joins a book club in order to gain a respite from Hal and the boys, and she soon learns that the club is an excuse for other mothers to get together and socialize.
John tries to save a suicidal teenager; Sammy convinces a former addict to be an informant; Tang gets a visit from someone from her past; Lydia and Ruben investigate a home invasion.