Heidi’s character arc takes a dark turn as her relationship with Cartman continues to corrode her personality.
: To keep her from leaving, Cartman manipulates Heidi into eating "Beyond KFC," which is actually just more fried chicken. She begins to physically resemble him. [S21E8] Moss Piglets
: Special ops teams eventually raid the science fair to secure the "intellectual property" of the moss piglets. Heidi’s character arc takes a dark turn as
: The tardigrades are taken away, leaving the kids' projects in ruins, while Heidi's transformation into a "female Cartman" is fully realized. : Special ops teams eventually raid the science
: The tardigrades become highly intelligent after being exposed to Taylor Swift's music, eventually learning to dance and perform complex synchronized movements. The Transformation of Heidi Turner
President Garrison (the show’s surrogate for Donald Trump) becomes obsessed with the science fair.
" Moss Piglets " is the eighth episode of South Park's 21st season. It weaves together three distinct storylines involving a science fair, a toxic relationship, and political tension. 🔬 The Science Fair Scheme