Are you a Breaking Bad fan? Tom Arnold is coming clean about his family's past.

We're used to comedian Tom Arnold making us laugh, but now, he's sharing a very personal story, that's anything but funny.

Over 30 years ago, Tom's sister, Lori Arnold, had a reputation as one of the biggest drug dealers for methamphetamine.

Tom Arnold believes their childhood is partly to blame for her actions.

"We covered a lot of stuff about our unfortunate childhood. But, I'm proud of the way [the documentary] turned out, because it also doesn't lie. My sister did a lot of bad things. She was with bad people and meth is bad, and she owns that."

The three-part documentary, Queen of Meth, is streaming now on Discovery+.