"The Boys" S4E6 reveals Joe Kessler as Butcher's imagination, and Firecracker offers Homelander breast milk.

"The Boys" Season 4's Episode 6, titled "Dirty Business," unveils major plot twists, including Joe Kessler (Jeffrey Dean Morgan) being a figment of Butcher's imagination, and Firecracker (Valorie Curry) offering to supply Homelander (Antony Starr) with breast milk. The showrunners maintained strict rules to keep the Kessler secret under wraps, and the breast milk scene adds to Homelander's mommy issues.