Firefly 03 ‘Bushwhacked’

From Tysto commentaries:

Revisiting the darker atmosphere of the original pilot already, the crew answers the distress call of a ship ravaged by reavers and then has to explain themselves to an Alliance commander who decides to investigate the horror… and the APB on a Firefly transport harboring brother and sister fugitives. The survivor the heroes pull from the derelict turns out to have space madness and is becoming a reaver himself. I compare the episode to Alien and to late-night talk shows.