Lupin the 3rd - Season 2 Episode 70 Can't Beat the Classics

Even though Zenigata comes raging up to FBI HQ, Lupin, Jigen, and Goemon are... clearly all in solitary confinement. This is actually all part of their plan, and they spring Clyde Barlow, an old man with the same name as the one-time machine-gun bandit. Then they get him to help in their attack on the trailer which the National Super Bank is using as temporary facilities while the main building is renovated. The old man's companion, Bonnie Parker, also signs on, and the activities of a mynah bird open the vault's door, but...?