Seth "Shifty" Bizner frequently relapsed on both seasons one and two of Celebrity Rehab and he relapsed during Sober House as well.
The sons of Sebert relapsed into idolatry and left the church to the mercy of the Danes.
He was described as suicidal, and, after appearing on the spin-off show Sober House, relapsed.
She struggled with treatment, and eventually relapsed.
Seth Binzer, lead singer of the band Crazy Town, appeared in the first season of Celebrity Rehab but was invited back for season two when Dr. Drew found out he had relapsed.