The process of gay-conversion therapy is universally deemed as harmful or not effective by scientists the world over. In fact, we’re one of the few Western countries where it is still legal (in most states) to operate a conversion practice (and a vice president who supports it). 20/20 went undercover to expose some of these institutions, where abuse and torture are the norm, and Christianity reigns down worse than brimstones.

The yearlong investigation by ABC News airs tonight on 20/20 at 10 P.M. EST.