1. Dexter: Season Six
A likable Miami police forensics expert moonlights as a serial killer of criminals whom he believes have escaped justice.
2. White Collar: Season 3 (Show is in a mid-season break)
A white collar criminal agrees to help the FBI catch other white collar criminals using his expertise as an art and securities thief, counterfeiter and racketeer.
3. Mad Men: Season Five
A drama about one of New York's most prestigious ad agencies at the beginning of the 1960s, focusing on one of the firm's most mysterious but extremely talented ad executives, Donald Draper.
Edit: Also The Walking Dead: Season Two, and of course Top Gear Series 18