Fact: The Walking Dead star Steven Yeun recently joined U.S. talk show host Conan O Brien for a trip to a nude Korean spa in Los Angeles to try out the centre's variety of health and beauty treatments. The pals had to strip naked for a sauna, a cold pool dip, a painful full body scrub and a hot jacuzzi, and filmed their experiences for a Tv segment which aired on Conan on Wednesday night (11Feb15).