Phoebe’s surrogacy. Ross and Emily’s short-lived marriage. Monica and Chandler in Vegas. Matthew Perry might not remember any of it, according to comments he made during an interview with BBC radio host Chris Evans.

When asked which episode of Friends was his least favorite, the actor replied, “I think the answer is, I don’t remember three years of it, so none of those. I was a little out of it at the time. Somewhere between seasons three and six.”

Perry, now an outspoken addiction recovery advocate, famously struggled with addictions to alcohol and several prescription drugs while filming the beloved sitcom. In 1997, the actor completed a 28-day program for Vicodin addiction, later telling Larry King that he took the painkiller “mostly just to not drink as much as I was.” In 2001, near the end of Perry’s purported memory gap, he entered a rehab hospital to recover from his use of Vicodin, methadone, amphetamines, and alcohol.