Cousineau is distraught with paranoia after Barry's arrest.

Source: https://www.slashfilm.com/1272063/barry-season-4-gene-cousineau-worst/

Dakota Murtha of Hilltown, a high school student, lauded her Pennridge teachers, specifically her history teacher, Bob Cousineau.

Source: https://www.mcall.com/2023/05/12/pennridge-community-supports-teachers-slams-school-board-in-heated-exchange/

Hader's Barry, claimed to have found God and washed all of his mortal sins away, arrives in Los Angeles for a deadly date with Gene Cousineau (Henry Winkler), set on profiting from the story of their soured friendship.

Source: https://www.salon.com/2023/12/30/best-tv-episodes-2023/

In addition to 18 months imprisonment, Cousineau was ordered to submit a DNA sample and forfeit all the property seized during the police search to the Crown.

Source: https://bc.ctvnews.ca/b-c-man-gets-18-months-in-jail-after-undercover-mountie-delivers-tasers-to-home-1.6694123

Lon is being called by "Batman voice" again, some mysterious person who warns Lon from talking to anyone else and promises to explain how "Gene Cousineau caught Barry Berkman."

Source: https://www.slashfilm.com/1256590/barry-season-4-episodes-1-and-2-review/

The teaser highlights Berkman in prison, calling Gene Cousineau (Henry Winkler) and seemingly trying to get out of his mess.

Source: https://screenrant.com/barry-season-4-trailer-bill-hader/

Those who can't do, teach, and that's precisely the case for former actor turned acting instructor Gene Cousineau, played by the Fonz himself, Henry Winkler.

Source: https://collider.com/barry-season-4-cast-character-guide/