|"The Key to the Universe"|
|Season 8, Episode 21|
|Premiere date:||November 10, 2016|
"The Ice Tape"
"No Train No Gain"
"The Key to the Universe" is the twenty-first episode in Season 8 (and two hundred and thirty-eighth overall) of Regular Show. It aired on November 10, 2016.
The guys learn about Pops' true origins and Pops begins his training with Earl to become the Chosen One and fight Anti-Pops.
- Muscle Man
- Hi Five Ghost
- Anti-Pops (vision)
- Huge Head (cameo, skeleton)
- This episode continues from "The Ice Tape".
- Starting from this episode, the 1999 Cartoon Network Productions Ripple/Cartoon Cartoons logo that featured the 1992-2004 Cartoon Network logo with the Service Mark (1999-2014) or Trade Mark (2014-present) symbol at the right side of it, the blue rings that appears when the music plays, and the parent company byline (A Time Warner Company from 1999-2001 and again used from 2003-present and the AOL Time Warner one was used from 2001-2003) was replaced with the 2016 one that takes place on a blue background featuring the two squares which consists of C (the white square) and N (the black one) and when they merge, the background will become white and form the 2010 version of the 1992 logo and the music is the four-note retro of the 2010 CN jingle. This is also the first Cartoon Network show to use the said logo as well.