What It's Really Like Inside 'Celebrity Rehab'

Season 4 of "Celebrity Rehab" is currently in the works -- and disaster has already hit the set.

Former "Party of Five" star Jeremy London's wife, Melissa, suffered two minor strokes and a brain hemorrhage while visiting her husband in the rehabilitation center. Thankfully, she is recovering.

"Extra" sat down with former "Celebrity Rehab" participants Tom Sizemore and Carrie Ann Peniche, who told us that the first couple of days in rehab are definitely the hardest.

"The thing for me that's really difficult was when I got clean, is looking at the devastation I have brought in my life and career," said Sizemore.

Peniche credits her recovery to "Celebrity Rehab" doctor and "Extra" Lifechanger, Dr. Drew Pinsky. "He's definitely not a 'TV' doctor," she said. "He's definitely a doctor and he's very sincere and generous with his time. He's reached out to my family and I still talk to him today."

Catch all the highs and lows of "Celebrity Rehab" in October on VH1.