The Venture Bros. (2004)

S04E16 Operation: P.R.O.M.

Team Venture, alongside Conjectural Technologies and the Order of the Triad, bands together as Dean and Hank gear up for a daunting challenge: their high school prom in honor of their "graduation." Dr. Venture spares no expense to create the ultimate dance experience for the twins, budgeted at $500. However, when chaos ensues, a monumental showdown unfolds as the OSI and SPHINX, two long-standing adversaries, face off once more, leading to the most epic confrontation in Venture history.