Watch The Simpsons Season 34 Episode 8 – Homer’s New Brother [VIDEO]

The simpsons‘ family tree could very soon sprout an unexpected new branch.

“Homer is stunned by his feelings of anger and resentment when Grampa becomes a devoted stepfather to his girlfriend’s quirky little son,” reads the official logline for Sunday’s episode (Fox, 8/7c). Melissa McCarthy is providing the voice of Homer’s potential new stepbrother Calvin, and as you’ll see in TVLine’s exclusive first look, they’re not exactly on the road to becoming best friends.

While Homer is clearly not thrilled about possibly having a younger step-sibling, this is hardly his first time at the surprise family member rodeo. From the unexpected return of his mother Mona to the discovery of his half-brother Herb — not to mention everyone who has come forward to disprove the whole “Simpsons gene” theory — Homer’s extended family has evolved quite a bit over the past 30+ seasons.

Elsewhere in Sunday’s episode, aptly titled “Stepbrother From The Same Planet,” Lisa and Bart throw “the ultimate slumber party.” Oh, and Carol Kane tells how Grampa’s new girlfriend slashes Calvin’s mom. That’s fun too.

Click PLAY in the video above for an exclusive first look at Homer’s new stepbrother Leave a comment below with your thoughts.