Demetri Martin’s stand-up has always had a mischievously nasty streak undercutting his floppy Beatles haircut and nice guy delivery—a willingness to take a joke just a little darker than his wide, friendly-looking eyes suggest he would. That tendency should serve him well among the spin-loving sociopaths on Showtime’s House Of Lies, which has added Martin to the cast in a recurring guest role for the show’s upcoming fourth season. The comic will play Ellis Hightower, a CEO and inventor working with unscrupulous management consultant Marty Kaan (Don Cheadle) and his crew of backstabbing associates.