Watching television depends on what one is watching. If one is watching something good, and for good objectives, then it would be all right.

Dr. Sano Koutoub Moustapha, chairman of the International Fiqh Academy and professor of fiqh and its principles states,

“Watching television is not haram as well as looking at pictures of living creatures. It is strongly recommended to watch good programs and news on television. This is due to the fact that television is a means which can be used for good as well as for bad.
therefore, everything depends on the intention of the person who is looking at the pictures of living creatures. If his or her intention is to learn and be informed about what is happening in the world, then it is strongly recommended to watch and look.
there is no single authentic text or order which prohibits watching television or looking at pictures as some people think. Islam does not deprive Muslims from benefiting from good means and tools. Islam welcomes all new technology such as television, planes, cars, trains, and the Internet and Islam urges Muslims to use them to spread noble teachings and values.
therefore, the individual should not reject technology without an explicit text and order. Scholars agree that the means to good are good, and likewise the means to bad are bad. In this context, prohibition or allowance will merely depend on the objectives of using or utilizing these means.”