Munch (Richard Belzer) is convinced that a student has committed suicide. Brodie (Max Perlich), however, thinks that the boy's death was caused by his drug-dealing classmate Alan Schack (a decidedly cast-against-type Neil Patrick Harris) -- and Brodie ends up risking his life to prove this theory. Elsewhere, Bayliss (Kyle Secor) and Kellerman (Reed Diamond) suspect that two recent bombings are linked to their longtime nemesis, drug kingpin Luther Mahoney. And a marriage counseling session ends disastrously when Frank and Mary Pembleton (Andre Braugher, Ami Brabson) argue over the baptism of their baby daughter. ~ Hal Erickson, Rovi