Conversation so far:
Who produced Celebrity Rehab with Dr. Drew?
Celebrity Rehab with Dr. Drew's producers include Jack Siefert for season 1, Duncan White for season 2, Lisa Digiovine, and Danita Jones.
What channel was Celebrity Rehab with Dr. Drew it on?
Celebrity Rehab with Dr. Drew is a reality television show that aired on the cable network VH1.
How many seasons was Celebrity Rehab with Dr. Drew on?
In May 2013, Dr. Drew Pinsky announced that season six of Rehab with Dr. Drew was the final season.
What year did the sixth season of Celebrity Rehab with Dr. Drew air?
Season 6 of Celebrity Rehab with Dr. Drew premiered on September 16, 2012.

Question: Why was it the final season?
Self-contained rewrite: Why was season six of Celebrity Rehab with Dr. Drew the final season?