Agent Lowenbrau Gottlieb is the primary antagonist in Mutt Williams and the Fertility Temple and is portrayed by Rainn Wilson.

Gottlieb was a KGB agent who aids Dr. Malvina Forshaw when desires the Fertility Chalice and he is also aided by a Japanese schoolgirl named Noriko Watanabe. As the Chalice unleashes its powers in the climax, Gottlieb's heart turns to stone. As his lifeless body gets sucked up into the black hole.

Gottlieb is likely based on Toht from Raiders of the Lost Ark.

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