Ricochet Rabbit — [s6e10]

Dexter Morgan tracks Travis Marshall to a yacht, which serves as the "Ricochet Rabbit" of the episode's title.

Realizing the threat, Dexter is forced to abandon Harry's Code to save lives, calling the police to report the yacht's location and the poison threat.

Dexter finds Holly's corpse on the yacht and realizes Travis has prepared a "Wormwood" poison gas designed to kill humans.