No--more likely to be sinful for the $#!+ they'll be captive and exposed to on cable TV, than an act of mercy. Plus you're being paid, and, I'm guessing, it's about the best work you can find for the time being. If you can find a better job, then don't be lead astray by the idea that your helping your soul any by bringing the filth of the world into a penitentiary, where (think of the root words) people should be repenting/doing penance for their transgressions.
Now if you were only enabling strictly true Catholic programming as a volunteer, then that may be different.