it depends entirely on the contect of the television program and the reason it is being watched. we should search for knowledge everywhere we can find it, even to china. so educational programs are cool.
if i am trying to give dawa to someone who loves the survivor tv show it could be worthwhile to watch it as a way to start a conversation and relate things to prophetic teachings and get a foot in the door. of course other than that the tv show seems to be entirely fake and pointless, for me anyway. so i believe it depends on the intention behind the tv program being watched.
of course we are allowed to have some leisure time too :)
family guy is just funny, i do not learn things from it typically, it just really makes me laugh. is it a waste of time? maybe. perhaps the leisure time of watching something like that does more good than bad, it can help to recharge our barttery so we do not get burned out on "important" things.
peace