Tonight, "Doctor Who: The Ultimate Companion" will air on BBC America, and now fans can watch the live stream before the season 8 premiere.

In this episode, "Peter Davison explores the role of the Doctor's companion and how the companions have changed over the years."

For BBC America, there is a live stream of the channel which can be accessed here or here (depending on your region, one may be accessible over the other), and through that, fans can watch the "Doctor Who: The Ultimate Companion" live stream online.

There are a lot of fake channels solely for the purpose of luring viewers with ads, but here is how you can avoid any potential hiccups with pop-ups and ads.

--Do not download anything that is suggested.

--For every ad, there is an "X" button. It is typically in a corner or out of the way so it is hard to see. Sometimes ads try to fool you by giving you a fake "X" graphic which leads you to an ad. Do not be discouraged when this happens, the real "X" button is there somewhere.

--Multiple ads will pop and it takes a little bit to clear out each and every ad. Even then, pop-ups will occur as you clear the ads. Do not listen to any of these ads or pop-ups and clear them right away.

--This "Doctor Who: The Ultimate Companion" live stream will have recurring ads that pop up every once in a while. If this is the only way you can view "Doctor Who: The Ultimate Companion," do not be deterred and the live streaming will work once the ads disappear.

Be sure to check out "Doctor Who: The Ultimate Companion" on BBC America at 9:00pm EST!