SUMMER OF SITCOM MARATHONS It's on at TV Land every Thursday-Sunday, featuring Long Island faves Ray Romano in "Everybody Loves Raymond" (Saturday 8:30 p.m.-1:30 a.m.) and Kevin James in "The King of Queens" (Thursday 10 p.m.-1:30 a.m.). Also marathoning: Betty White's gang in "The Golden Girls" (Sunday 5 p.m.-1 a.m., with White's "Hot in Cleveland" at 7 and 11 p.m.) and TV Land newbie "Friends" (Friday 8 p.m.-5 a.m.). Episode details at tvland.com/tv-schedule.
DARING DUO Nik Wallenda, who high-wired it across Niagara Falls for a TV special, now plans to stroll over the Grand Canyon in "Skywire Live" (Sunday at 8 p.m., Discovery). That feat is followed by the series premiere of "Naked & Afraid" (Sunday at 10:20 p.m., Discovery), an "extreme" survival series in which one man and one woman are abandoned duds-free in a remote location with nothing, apparently, except a well-equipped camera crew. Previews at discovery.com.
CNN SPRUCES UP Weekend prime time on CNN gets a makeover with more distinctive reality originals like "Anthony Bourdain Parts Unknown" (Sunday at 8 p.m.). Premiering this weekend: Ridley Scott's docuseries "Crimes of the Century" (Sunday at 9 p.m.), launching with 2002's Washington-area sniper attacks and Morgan Spurlock's "Inside Man" (Sunday at 10p.m.), this time delving into medical marijuana. Check out cnn.com/crimesofthecentury and cnn.com/insideman.
CELEBRITY SMACKDOWN! What else can you call it when Joan Rivers changes places with Bristol Palin in the summer premiere of "Celebrity Wife Swap" (Sunday at 8 p.m., ABC/7)? Or when wrestlers Ric Flair and Rowdy Roddy Piper are next week's switcheroo? More at abc.tv/12W3ZSY.
DRAMA DAYS Summer is sizzling with scripted adventure and amusement. This week, we get cool returnees like the contemporary saga "Drop Dead Diva" (Sunday at 9 p.m., Lifetime), the historical drama "Copper" (Sunday at 10 p.m., BBC America) and the procedurals "Rizzoli & Isles" and "Perception" (Tuesday at 9 and 10 p.m., TNT). New series are debuting, too. "Crossing Lines" (Sunday 9-11 p.m., NBC/4) stars "Prison Break" fave William Fichtner and Donald Sutherland in international criminal investigations. "Desperate Housewives" creator Marc Cherry turns his sly eye to "Devious Maids" (Sunday at 10 p.m., Lifetime), as played by Ana Ortiz, Judy Reyes, Dania Ramirez, Roselyn Sanchez and Edy Ganem, with Garden City soap diva Susan Lucci among their employers; episodes will be available in English and Spanish. (Details at mylifetime.com.) Finally, "Breaking Bad" lawman Dean Norris co-stars with Mike Vogel, Rachelle Lefevre and Natalie Martinez in Stephen King's big suspenser "Under the Dome" (Monday at 10 p.m., CBS/2). Watch Norris video chat at cbs.com/under-the-dome.
SYFY THURSDAY Saturday is no longer big enough to contain the thrills! The channel's cheesefest original flicks spill out of the weekend into Thursday's premiere of "Independence Day-saster" (9 p.m., Syfy), where an alien invasion spurs the president's small-town brother and a renegade scientist into taking action on their own. Tom Everett Scott and Ryan Merriman star. See syfy.com/movies.
ALL-STAR OPRAH Alfre Woodard, Viola Davis, Gabrielle Union and Phylicia Rashad visit "Oprah's Next Chapter" (Sunday at 9 p.m., OWN) to discuss Hollywood challenges for African-American actresses. Their panel is followed by the documentary "Dark Girls" (Sunday at 10 p.m., OWN), tackling the touchy subject of prejudice against dark-skinned women. More at oprah.com/oprahsnextchapter.