Fans are waiting for the Season 10 premiere of "Big Bang Theory" this fall, and with all the drama stirring up in Season 9, they are up for a good run.

In the last season, we left off with a big shocker. Leonard Hofstadter (Johnny Galecki) planned to marry his wife Penny (Kaley Cuoco) in front of family and friends like he promised. Plus, his mom Beverly (Christine Branski) was upset when she didn't get to see her son tie the knot.

So now the families are brought together for the wonderful ceremony. Only, Leonard invited his dad Alfred (Judd Hirsch) without telling his mom first. She was infuriated, especially since they had an ugly break up following Alfred's affair. Can you say scandalous?

When the divorced couple entered the same room along with Sheldon Cooper's (Jim Parsons) God-fearing mom Mary (Laura Elizabeth Metcalf), you can cut the tension with a knife. But that didn't stop Leonard from having a nice dinner before the big ceremony.

After a big argument with his ex-wife who called him broke, Alfred went back to the hotel without staying for dessert. He also invited Mary in for a nightcap since they were staying at the same hotel.

Did they hook up? It seems like they did since both of them still had their phones off when their sons tried to reach them in the morning.

The show's Executive Producer Steve Molaro tells Entertainment Weekly that the two parents hooking up is just speculation right now.

And what's going on with Howard Wolowitz (Simon Helberg) and Bernadette Rostenkowski (Melissa Raunch)? In the last season, we learned that they're expecting a new baby.

Will we get to see the little guy, or little girl? And how will that effect Howard's somewhat too attached relationship with best friend Rajesh Koothrappali (Kunal Nayya)?

Also, what's going on with Amy Farrah Fowler (Mayim Bialik) and Sheldon's relationship? The couple known for moving ridiculously slow in their relationship are still going strong. Will Sheldon ever propose to Amy?

After their brief break up, Sheldon asked his mother for his grandmother's ring to give to his ex-girlfriend of five years. When they got back together, he ditched the ring and gave her his virginity instead.

"Big Bang Theory" returns to CBS Monday Sept. 19 at 8 p.m. EST.

Watch this short YouTube video of the last few moments of the Season 9 finale.