When: From Jan. 9, Fri., 10 pm ET, on HBO
What: Maher's fall season featured CelebStoners Seth Rogen and Kal Penn, whom he asked to deliver a message about marijuana to his former boss, Pres. Obama. In another episode, Maher divulged his undergrad drug-dealing secrets ("selling pot allowed me to get through college"). When recreational marijuana sales starting in Colorado, he crowed, "Let's get high now that it's legal." The ultra-liberal host never misses a chance to stump for weed.