VIDEO: Joan Rivers on Whitney Houston Jokes: You Don't Want to Do It Once Somebody's Dead

Stephen Colbert The Colbert Report unexpectedly shut down production on Wednesday and Thursday of this week for "unforeseen circumstances," and the NY Post reports that Stephen Colbert took the break to care for his ailing 91-year-old mother in South Carolina. "They are a very private family," a source told the Post. "It's not surprising that he did not want anyone to know what was going on." Colbert Report taken off the air due to "unforeseen circumstances" Prior to Wednesday's taping, audience members received a last-minute email saying that their reservations had to be canceled. No further details were provided. Comedy Central tells the Post that The Colbert Report will air repeats until further notice, but could return as early as next week.