how to get my third monitor (TV) to work

[jshawk03]

So I already have 2 monitors hooked up to my PC. I have a TV that I want to use as a 3rd monitor. Just want to know if I will be able to connect to one of my other monitors instead of the tower to get the picture to work, and if so how do I do this?

 

[alexoiu]

What monitor and graphics card?