Off the Wall just loves a monster mash(up).
SHOWTIME FOR SHOWTIME Wow, it's a marathon of marathons on the premium cabler's channels. "Shameless" and "House of Lies" started it Friday. Now the weekend stacks up full seasons of Claire Danes' acclaimed drama "Homeland" (Saturday noon-midnight, Showtime) and Michael C. Hall's "Dexter" (Saturday noon-midnight, Sho2). Also previous episodes of two half-hours before their season-enders: "The Big C" (Sunday 11 a.m.-3:30 p.m., Sho2; finale Sunday at 9:30 p.m., Showtime) and "Nurse Jackie" (Sunday 3:30-8 p.m., Sho2; finale tomorrow at 9 p.m., Showtime). Stick around for the finale of "The Borgias" (Sunday at 10 p.m., Showtime). Previews at sho.com.
TITLE OF THE WEEK Who really cares what happens in a movie titled "Piranhaconda" (Saturday night at 9, Syfy)? You gotta be there anyhow. Michael Madsen and Rachel Hunter star in low-rent producer Roger Corman's latest cheesefest. Video at syfy.com/movies.
FATHER'S DAY FUN Dad sure doesn't know best on "South Park" (Saturday night 9-midnight, Comedy Central), at least not Stan's dad, Randy Marsh. But then there's Jim Anderson, actor Robert Young's legendary patriarch on '50s touchstone "Father Knows Best" (Sunday 7 a.m.-midnight, Antenna TV). And more recently, there's Enrico Colantoni's cool cop papa to Kristen Bell on "Veronica Mars" (Sunday 3-7 p.m., SOAPnet). Check "VM" schedule at soapnet.com/shows.
UNSCRIPTED PREMIERES Long Island's Carol Leifer is among the female comics on "Standup in Stilettos" (Saturday night at 10, TV Guide Network), hosted by Kate Flannery of "The Office." Other big names among this week's reality arrivals: "Bristol Palin: Life's a Tripp" (Tuesday at 10 p.m., Lifetime) and "Snooki & JWoww" (Thursday at 10 p.m., MTV), those bundle-o'-fun "Jersey Shore" girls. Also new: "Forensic Firsts" (Sunday at 9 p.m., Smithsonian) tracks DNA profiling. "Made #DreamBigger" (weekdays at 4 p.m., MTV) ages-up its focus to college students and young adults. "Danger by Design" (Monday at 9 p.m., Science) follows the high-wire-walking family of Niagara Falls daredevil Nik Wallenda. "Miss Advised" (Monday at 10 p.m., Bravo) spotlights relationship experts, including New York's Amy Laurent. "School Spirits" (Wednesday at 10 p.m., Syfy) seeks campus ghosts at SUNY Geneseo and other universities. And "Diamond Divers" (Wednesday at 10 p.m., Spike) goes underwater off the coast of South Africa.
AWARDS ALERT Katy Perry, Justin Bieber, Carly Rae Jepsen, Kelly Clarkson, Flo Rida and LMFAO headline this year's "MuchMusic Video Awards" (Sunday at 9 p.m., fuse). See nominees, more at fuse.tv/shows/muchmusic- video-awards.
SEASON FINALES So who did kill Rosie Larsen? Find out as season 2 concludes on "The Killing" (tomorrow at 9 p.m., AMC). Betty White shows up on the season 1 finish of Jennifer Love Hewitt's already renewed drama "The Client List" (Sunday at 10 p.m., Lifetime). Video at mylifetime.com/shows/the-client-list.