Agatha All Along star Kathryn Hahn and creator Jac Schaeffer on that premiere episode moment showing a "side" of Agatha we didn't expect.

The first reviews are across the spectrum from calling it "thoroughly enjoyable" to saying it's "trying to do too many things at once."

The Marvel Cinematic Universe built an empire on minor characters, proving that strong execution and an overarching brand could elevate once-fringe figures like Black Widow or the Guardians of the Galaxy into franchise mainstays.