'Big Bang Theory' Season 10 Premiere: Are Sheldon and Leonard Going to be Stepbrothers? Discover the Awkward T

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"Leonard, do you realize you and I could become brothers?"

And with Sheldon's jaw-dropping opening sentence, The Big Bang Theory's tenth season kicked off with… well… a presumed bang!

When we last saw our favorite gang of beauties and geeks, sparks were flying between Leonard's dad and Sheldon's mom, and all signs were pointing towards a coitus-filled conundrum for the two BFFs/roommates -- so did a nightcap turn into a new couple?

WATCH: 'The Big Bang Theory': Penny's Mother and Brother Have Arrived!

We hate to to burst your theoretical bubble, but the answer is… nope!

As it turns out, Alfred Hofstadter (Judd Hirsch) and Mary Cooper (Laurie Metcalf) shared a lovely evening of innocent flirtation-filled conversation with one another, but nothing life-changing happened -- at least not yet.

The coy twosome did admit that they were fond of one another, and even began planning trips to visit each other in their respective towns, but, as of this point, Leonard and Sheldon will not have to forgo their roommate agreement for a brotherly bond.

However, we did meet Penny's high-strung mother, Susan (Katey Sagal), and her formerly jail-bound brother, Randall (Jack McBrayer), and they were the perfect chaotic addition to the Big Bang family.

Press play on our exclusive sneak peek of Penny's family from the Big Bang Theory's premiere below!