Heist — [s2e17] The Ultimate

The phrase "The Ultimate Heist" is also used in other popular media and gaming, though typically not with that specific season/episode numbering:

While the show is famous for its "Halloween Heist" episodes, fans sometimes refer to the grand finale or specific high-stakes heist episodes (like "The Last Day") using similar titles. "Ben 10: Omniverse" The Ultimate Heist (TV Episode 2013) [S2E17] The Ultimate Heist

Albedo successfully switches places with Ben Tennyson, sending Ben to the Plumber HQ prison while he infiltrates the team. The phrase "The Ultimate Heist" is also used