In reply to Flinticus:
There are lots and lots of different ways of doing this (VGA, DVI, DisplayPort, HDMI, Miracast...). And each laptop typically supports one or two, and each TV supports one or two - hopefully there will be one which is supported by both, and if not you'll need an adaptor.
If you can post the model number of your laptop and TV, I or someone else can probably look it up pretty quickly.