"You Don't Know what I Know"
"What do you say?" Dr. Phil asks Katherine.
"When we first started this season, I did have a drinking problem and a partying problem. Over the past couple months, I have had a few drinks, but I have not gotten to the point where I'm dependent on something," she explains.
Dr. Phil implores Katherine to tell the truth. "You don't know what I know, and we made a deal. Don't you lie to me, because if you lie to me, I'm somebody you used to know," he says.
"He means it Katherine. He means it. Just go there, now, please," Erin says to her daughter.
"You can't do it by yourself, Katherine," Alex tells her sister.
"I don't have any drug issues. I'm not addicted to any specific drug, alcohol, pot or anything like that," Katherine maintains, but she admits that she has used drugs recently.
"That's a dead-end street," Dr. Phil tells her. "If you're saying that you have that under control, if you say you have the partying under control, then time will tell. If I call down there and say out of the clear blue I want you to take a drug test within the next 12 hours, I expect a drug test within the next 12 hours. Expect that call."
"OK," Katherine says.
"No," she replies.
Dr. Phil tells her to stop behaving in that manner. "She's had enough. She made a lot of mistakes along the way, but she's doing the best she can, and she's going to do better," he says to Katherine about her mother. "Everybody needs to do better."