Sheldon will retire “Fun With Flags” when The Big Bang Theory season 8, episode 10 airs tonight. Here are new clips and everything you need to know about the episode!

The synopsis for tonight’s episode, titled “The Champagne Reflection,” makes it clear that the whole geeky gang will be busy tonight.

“Sheldon says a tearful goodbye to “Fun with Flags.”” CBS says. “Also, Leonard, Howard and Raj look for something significant in a dead professor’s research, and Bernadette is shocked to learn her co-workers’ true feelings from Penny.”

It’s nice to see that Dr. Cooper has recovered from last week’s episode of The Big Bang Theory, when Leonard’s nasal surgery caused Sheldon such anxiety that he broke his own nose. At the same time, Howard and Bernadette struggled to strengthen their marriage after learning that Raj’s parents had split.

It’s hard to say how the Wolowitz-Rostenkowskis will fare this week, but the preview for “The Champagne Reflection” suggests that Sheldon and Amy will be practically joined at the hip, as Sheldon retired “Fun With Flags.

The first clip from The Big Bang Theory season 8, episode 10 features another farewell, as Leonard, Howard, and Raj clean out a deceased professor’s office.

The second clip offers a look at what may turn into a very bad night for Bernadette… and everyone around her.

The still images from “The Champagne Reflection” gleefully illustrate what lengths Sheldon will go to to send “Fun With Flags” off in style – and also display the bubbly hinted at in the episode title.

Where to watch ‘The Big Bang Theory’ season 8, episode 10 online:

Catch The Big Bang Theory season 8, episode 10 on CBS.com. New (and old) episodes are also available for purchase on Amazon and iTunes.

The Big Bang Theory season 8, episode 10, “The Champagne Reflection,” airs tonight at 8:00 p.m. on CBS.

What are your hypotheses for ‘The Champagne Reflection’?