Objects in Space - S1.E14

River telepathically hears the crewmembers' innermost feelings. When she picks up a gun in Serenity's cargo bay (which she perceives as a tree branch), the others discuss if she's too dangerous to be kept aboard. Bounty hunter Jubal Early sneaks aboard the ship, intent on claiming the bounty set for River and Simon. Early incapacitates the crew and forces Simon to help him locate River, who has seemingly vanished. While searching the ship, Early recites existential philosophy, claiming to not be evil, simply incentivized to do what is necessary. River's voice appears on the PA system, claiming that River melted and fused with Serenity.