Will Jones

So here's my idea for the 2nd version of TBBT. Ethan gets in a relationship with Penny, and Leonard entered a relationship with a friend of hers, maybe a roommate. Now for what happened between Penny, and Leonard throughout the series does it happen between Ethan and Penny or is it more stable, there's still a break-up or two, but more stable. And should I have the on/off relationship between Leonard and oc female?