Sex, drugs and rock and roll is an expression almost as old as rock music. For Steven Adler these things may be too interconnected for him to successfully tour with his band and find sobriety, as we saw on 'Celebrity Rehab with Dr. Drew' (Sun., 9PM ET on VH1).

When Dr. Drew's Head Counselor, Bob Forrest, stopped in to check on Adler, he was disappointed to find the former Guns N' Roses drummer was still smoking marijuana, and apparently on a daily basis.

To emphasis the severity of Adler's addiction, Forrest asked, "Why couldn't you just not smoke pot for a day? That's what I want to point out to you. You knew I was coming here."

Steven Adler and the other patients on 'Celebrity Rehab with Dr. Drew' (Sun., 9PM ET on VH1) got a sobering reminder about how dangerous addiction can be. It was an especially difficult moment for Adler, though, because of the close personal relationship he had with former 'Celebrity Rehab' patient Mike Starr.

Dr. Drew and the staff learned that Starr had died of a drug overdose shortly after getting prescription pain medication. Shelly Sprague broke the news to Adler, who immediately knew what had taken his friend's life.

Steven Adler walked out the door after a tense discussion with Dr. Drew and Amy Fisher on 'Celebrity Rehab With Dr. Drew' (Sun., 9PM on VH1).

Claiming that Fisher's dishonesty and unwillingness to share with the group was holding everyone back, the former Guns N' Roses drummer charged Fisher with living in denial.

"What's wrong with denial?" Drew asked.

Amy Fisher is very withdrawn so far on 'Celebrity Rehab with Dr. Drew' (Sun., 9PM ET on VH1) and it's not sitting well with former Guns N' Roses drummer Steven Adler. Both are patients, but Adler took serious issue with Fisher in two consecutive therapy sessions.

First, he yelled at her when she compared the rehab facilities to prison, defending their current accommodation as far better. Then, in a later group session, Fisher declined to identify herself as an addict or an alcoholic. Instead she said she was just listening right now and had nothing to contribute.

"Might as well identify yourself as what you are," Adler told her. "Because you wouldn't be here if there was nothing."

Steven Adler's relapse back into drugs was cause for real alarm on the fifth season premiere of 'Celebrity Rehab with Dr. Drew' (Sun., 9PM ET on VH1). When he was a part of the show in 2008, he physically and verbally assaulted rehab technician and former addict Jennifer Gimenez.

When she heard he was coming back into the facility, she had a full-blown panic attack. "Not only did he physically abuse me," she said. "He emotionally and verbally abused me. So all those fears came back."

She was able to talk it out and calm down, realizing that Adler on drugs us not the man himself. "I think Steven Adler when he's on drugs is a monster," she said. But the idea is to get Steven Adler off of the drugs and have him be the man he should be.