I have a whole bunch of season 3 of The Walking Dead recorded. They were simply killing too many people off. Under the Dome looked like it might be headed the same way.
Most everything else I was watching has just finished: NCIS, NCIS LA (season 1, not finished, but they're showing Big Brother instead), Castle (seasons 3!), The Mentalist, Agents of SHIELD (without the films they make no sense), The Tomorrow People (not staying true to the original) and Helix, although I haven't watched all of Helix yet.
CSI has just restarted, and there's seasons 7 of The Big Bang Theory. TBBT was on before The Tomorrow People and I got addicted.