After 37 years, PBS' "Masterpiece Theatre" is getting spruced up. The anthology series will be split into three mini-seasons, each with its own theme and host, one of whom is Gillian Anderson, familiar to "Masterpiece" fans for 2006's "Bleak House." Anderson ("The X-Files") will debut as host of the renamed "Masterpiece Classic" on Jan. 13. Through May, she will present 10 programs, including adaptations of six Jane Austen novels. In the summer, "Masterpiece Mystery!" will absorb the "Mystery!" series, and in the fall, "Masterpiece Contemporary" will focus on present-day dramas.