Who let Nemesis out of the basement?

This video from The Universe proposes how our Sun might have a binary star orbiting around with it. 

     Could it be that we are on the verge of being visited by a dwarf star orbiting around the Sun?  As the video explains, most of the stars in our neighboring universe are in binary systems rotating around a center of mass point.  There are billions of trillions of undiscovered binary systems throughout the universe; however, talk about our own Sun being in a binary system allows us to study closer to home.  The problem is locating the dwarf star rotating the Sun.  From Earth, when looking for binary stars, we search for signs of orbits by viewing eclipsing light intensities.  Tons and tons of data is collected and sifted through in order to find patterns of high and low intensities in periodic motion.  Years can pass by before seeing only one single orbit or on rare occasions multiple orbits.  Once detected, the sizes of both stars are measured using the time period from the start of the eclipse to the end of the eclipse, allowing us to see what stage of life each star is found at.  Why is this a problem for our solar system?  

Oort cloud animation

     The proposed idea of a binary Sun named Nemesis was brought forth by astronomer Richard Muller after geologist found a pattern in extinction events of massive proportions.  The 26 million year pattern let him com to the conclusion that something must be orbiting our Sun and disrupting comets around our solar system in the oort cloud.  We can think about it as a dust devil moving along the ground and hitting a patch of dead leaves.  The leaves are spun around sent in different directions before falling back down on a different location.  In space similar affects happen with the giant comet like rocks, the only difference is gravity is not much of a barrier when spun to a different direction.  Could life be in danger of having a visit by a disturb comet(s) due to Nemesis coming back?  How do we prepare for such an event?  Questions like these lead us to think that conspiracy's brought forth about "doomsday" or "Nibiru"  or the infamous "Mayan Dec. 21, 2012"  might be standing a bit taller than they were yesterday...unfortunately.