What to Watch: December 28

'Dog Whisperer' Week (8PM, NGC)
Every night this week, from 8-10PM, it's back-to-back episodes with 'Dog Whisperer' Cesar Milan, and he kicks off a busy five days with the show's first trip to help some pooches outside the United States. 'Cesar Down Under' takes the titular teacher to Australia, a country with more than 400 million dogs, for his international doggie do-gooding, as he helps a Great Dane with a big biting problem and a bearded collie who's just a bit too aggressive.'Dog Whisperer' Week (8PM, NGC)
Every night this week, from 8-10PM, it's back-to-back episodes with 'Dog Whisperer' Cesar Milan, and he kicks off a busy five days with the show's first trip to help some pooches outside the United States. 'Cesar Down Under' takes the titular teacher to Australia, a country with more than 400 million dogs, for his international doggie do-gooding, as he helps a Great Dane with a big biting problem and a bearded collie who's just a bit too aggressive.

'Cake Boss' marathon – Five hours of pastry-bakin' fun with Buddy and his Hoboken cake cohorts (5PM, TLC)

'Pawn Stars' marathon – Six episodes ... that's a whole lot of Chumlee (8PM, History)

'True Blood' marathon – Another week-long event: HBO replays the entire first season of the blood-sucking drama, three episodes a night, tonight through Thursday (8PM, HBO)

'MythBusters' – In their new timeslot, Adam and Jamie test out six viewer-submitted myths, including whether or not you can send a coconut through the mail (9PM, Discovery)

'Hoarders' – Kinda makes you want to put everything you own on eBay, doesn't it? (10PM, A&E)

'Men of a Certain Age' – Joe doesn't really handle it well when Owen and his wife double date with Joe's ex (Penelope Ann Miller) and her new boyfriend (10PM, TNT)

'R.E.M.: This Is Not a Show' – The documentary follows the band as Michael Stipe and the fellas prepare for a five-night stint at the Olympia Theater in Dublin, Ireland (10PM, Sundance)