Scientology Boot Camp for Katie Holmes

Katie was recently secluded for three days at Gold Base, the remote, supersecret Scientology compound in Hemet, Calif., where she was put through a demanding schedule.

"It included various tests, confession sessions, tons of reading and physically challenging purification processes," a Scientology insider reveals. "Tom insists that auditing and purification practices are incredibly beneficial to Scientologists at all levels."

Katie's intensive Scientology training and treatments have been accelerated in recent weeks, says another source, because she wanted to go to New York City without Tom to star in a Broadway play. But Tom stepped in and put the kibosh on her plans. And now Katie's been going in for a series of intensive auditing sessions, some which have lasted for 36 hours straight — with little sleep or food.