Dexter s06e06. "Just Let Go". Impossible by nature.

Somehow, Showtime and HBO specialize in shows that take off around the middle of the twelve episode season into a downfall spiral of frenzy enjoyment. Dexter couldn't be less, and brings us in this chapter the beginning of what it appears to become the darkest Dexter ever.
Brother Sam's death, and Dexter's struggle to come to terms with the former's last desire of forgiving his killer vanishes all of the sudden when Nick (the killer) laughs when he realizes that nobody will be able to link him to Brother Sam's murder. At that time, Dexter, who is delivering the message of forgiveness, lets loose his dark passenger. Dexter (at his best) has no other option than strangle him right in the spot.
Immediately after, the voices inside Dexter's head transforms from the protective father figure to the encouraging brother one. Let's see how far he can push a Dexter in despair.

Yes, the ice truck killer is back, and now, the stealing of the hand by  Masuka's  intern starts making sense.
Masuka fired his female intern after the incident, and substituted her by the computer nerd male intern, who, nevertheless, had the honor of participating in the best delivery of the episode.
Intern (after seeing Dexter explaining Brother Sam's shooting by just looking at the blood): Wow, Dexter is fucking awesome.
Masuka: Of course, we are fucking Miami metro.

Mmm, now this sentence doesn't sound that good, I may not be remembering it exactly, but if you have seen the episode you know what I'm talking about.