Losing my religion

Tom Cruise and John Travolta take a verbal beating in “Going Clear: Scientology and the Prison of Belief,” a devastating documentary that goes as far as any film so far to debunk L. Ron Hubbard’s church and how it treats its members. Director Alex Gibney doesn’t pull any punches as he zeros in on the abuse and betrayal that have all too often been ignored in fear that Hollywood A-listers would rebel. Academy Award winner and former believer Paul Haggis is among the talking heads who take us behind the scenes in a fascinating exposé based on the bestselling book by Pulitzer Prize winner Lawrence Wright. 7 p.m. Sunday, HBO

Deadly disease

Ken Burns serves as executive producer for “Cancer: The Emperor of All Maladies,” a three-night, six-hour documentary that follows the disease from its first mention in an ancient Egyptian scroll to scientists tackling the problem in modern-day research centers. Barak Goodman directs. 8 p.m. Mon.-Wed., TPT, Ch. 2

As long as you love me

“The Comedy Central Roast of Justin Bieber” promises to be an irreverent affair with the likes of Hannibal Buress, Natasha Leggero and Jeffrey Ross tossing out zingers, but you won’t hear the most politically incorrect moments. Jokes about the late Paul Walker were edited out of the final product. 9 p.m. Monday, Comedy Central

Only the lonely

“Weird Loners” is a new sitcom that could go either way. You don’t believe for a minute that these thirty-something friends would really be socially awkward, but the foursome have good chemistry and fairly decent material to work with. Give this one a chance. 8:30 p.m. Tuesday, KMSP, Ch. 9

Neal Justin