Is Nemesis star a real posibilitiy?w/video

I saw this on the history channel the other night.
It got me thinking if this was a real possibility.
The 26 million year clock work extinction events are what got me interested.
Im not sure if this falls under the planet X/Nibiru theory.
I was looking at this as a companion star to our star theory.
Not a rouge planet.
It seems to make sense that it would cross a long orbit of 26 million years.
If this is an ongoing discussion,than my apologies for posting this topic again.

Here's the show I saw.


What are your thoughts?



[edit on 28-2-2008 by Black_Fox]