It’s Joey Lawrence’s world; we just live in it. Who knew that the star of “Gimme a Break!” and “Blossom” would get so many free refills on his 15 minutes of quasi-fame?

Lawrence returns to host the summer distraction series “Master of Dance” (7 p.m., TLC). Why? Because he was a contestant on “Dancing with the Stars.” That series appears to be a training ground for future cable “talent.”

Lawrence doesn’t dance on “Master,” but that doesn’t matter, because the show is cheesy enough to get by on automatic pilot. Seemingly inspired by a monstrously successful YouTube video some years back, “Master” asks contestants to show off classic dance moves to popular songs from the disco era forward. It’s really a dance karaoke contest, and, as such, it provides all the empty entertainment calories of a six-pack of “Star Search” repeats.

The judges include dancer Lucinda Dickey, whose film credits include “Breakin’ 2: Electric Boogaloo”; choreographer Keith Diorio, who has worked with Paula Abdul, Ricky Martin and Jennifer Lopez; and comedienne Loni Love, who offers wisecracks and kind words of support.

Vintage clips might improve “Master” to remind us what the old-school dances we are judging are supposed to look like. But flashbacks to “Soul Train” appear to be beyond this show’s budget. You have a host, three judges, five contestants and a set that looks as if it was borrowed from a game show. But, hey, if a female welder can find her “Flashdance,” a “Master” can dance anywhere.

¢ “Nashville Star” (8 p.m., NBC) enters its sixth season. Jewel has signed on as a “mentor,” and tonight’s contest will feature performances by Taylor Swift, recently named best new female talent by the Academy of Country Music.

¢ The documentary “Roman Polanski: Wanted and Desired” (8 p.m., HBO) profiles the acclaimed director and revisits the controversial conviction for intercourse with a minor that sent him into exile.

Rich in period footage, the film includes interviews with friends, colleagues and contemporaries as well as legal figures from the Polanski trial and the victim herself, all grown up and quite willing to talk.

“Wanted” recalls Polanski’s meteoric rise from an obscure Polish filmmaker to the top of Hollywood’s A-list, the brilliant innovation of “Rosemary’s Baby” and his brief golden moments with wife Sharon Tate. After her murder by the infamous Manson gang, the tabloid press cast Polanski as a satanic figure whose dark art may have been “responsible” for her death. Naturally, his relationship with the media soured after that. The film also cast doubts on the behavior and motivations of the Los Angeles judge who presided over the case.

Tonight’s other highlights

¢ Homicide unfolds in a kinky demimonde on “Bones” (7 p.m., Fox).

¢ “RFK Must Die: The Assassination of Bobby Kennedy” (7 p.m., Documentary) challenges the standard history of the presidential candidate’s murder.

¢ An astronaut’s senses take a turn for the strange on “House” (8 p.m., Fox).

¢ “American Experience” (8 p.m., PBS, check local listings) concludes a two-part look at Las Vegas.

¢ A twin falls under suspicion after a real-estate mogul expires on “CSI: Miami” (9 p.m., CBS).