What happened on this week's 'Dexter' season 4 episode 12, 'The Getaway' -- in 100 words or less.

'Dexter' ends with a bang ... and a whimper. After an awkward meeting at the station, Dexter pursues Arthur, but a fender bender sidelines him, allowing Arthur to flee.

Debra and crew storm Arthur's house, only to find a bewildered family. Debra learns that Laura Moser was Dexter's biological mother, and Brian -- the Ice Truck Killer -- his brother.What happened on this week's 'Dexter' season 4 episode 12, 'The Getaway' -- in 100 words or less.

'Dexter' ends with a bang ... and a whimper. After an awkward meeting at the station, Dexter pursues Arthur, but a fender bender sidelines him, allowing Arthur to flee.

Debra and crew storm Arthur's house, only to find a bewildered family. Debra learns that Laura Moser was Dexter's biological mother, and Brian -- the Ice Truck Killer -- his brother.

Arthur ends up saran-wrapped to Dexter's table, then dumped into the ocean in plastic bags. At home, Dexter finds a grisly scene. Rita lies dead in a bloody bathtub, the baby crying in a pool of blood on the floor.

More recaps:
• At the L.A. Times Blog, Claire Zulkey likes the "re-set" that's been engaged, and hopes for "a new rhythm from Dexter after this and maybe even see an angry, vengeful Dexter."
• At CinemaBlend, Steve West wonders, "Will the demon ever let Dexter go?"
• TVFanatic said the finale was billed as a game-changer, and "wow, it didn't disappoint."
• TV Squad's Danny Gallagher said "it physically hurt to watch Rita die in such a cruel and inhumane way."