We can think of so many different scenarios for the season finale and series finale of The Big Bang Theory, but we, like thousands of fans out there, really only want a happy ending. 

One of our favourite happy endings is the one in which Penny (Kaley Cuoco, 33) and Leonard (Johnny Galecki, 43) have children, however Lindsey Kraft's new character, Melissa, could make this ending take on a somewhat different twist. 

The Big Bang Theory cast

The Big Bang Theory: Melissa wants to have a child with Zack

According to TVLine, Melissa will be playing Zack's (Brian Thomas Smith, 41) new wife. Zack, Penny's ex-boyfriend, is infertile, which puts a spanner in the works for Melissa's desire to have a baby. Desperate, Zack and Melissa turn to Leonard for help.

One thing is for sure, the final season of The Big Bang Theory is going to be anything but boring, thanks to the arrival of new cast member Linsey Kraft! The thirty-eight-year-old actress last appeared in the sitcom Grace & Frankie and the Roseanne spin-off The Conners.