The Latin phrase left at each of the robberies is "Orbis Pro Vox", which they say means "Ring for Right". Actually, orbis pro vox translates to "A Voice for the World". Ring for right would be "Quia ius Anulus".
When Chuck picks up the Victrola phone in her room and is explaining it to Ned, a scene from the 'Pie-lette' can be heard through the speaker. (The scene where Lily and Vivian are discussing menopause and Charlotte's last days with Ned and Emerson)
When Rob is explaining his story to Chuck, the flashback shows Rob and Gustav talking in town, with a movie theater marquee in the background. The movie playing is Robin Hood.
The title refers to the legendary English outlaw Robin Hood, who robbed from the rich and gave to the poor while fighting the evil laws and taxes of King John and the Sheriff of Nottingham in the 13th century.