When Charles and Uma are in the restaurant, he is insinuating that she's much older than him. In fact, Steve Martin is 15 years older than Jackie Hoffman.
Mel Brooks, who appears as "himself" in a video-call scene with Oliver (Martin Short), was 97 years old at the time this episode aired.
At 14:35, when in Ben's (Paul Rudd) apartment for the auction, there is a poster in the background for "Sex Panther", which looks to be a movie Ben starred in. Sex Panther was also the name of the putrid cologne Paul Rudd's character Brian wore in Anchorman (about which he claimed that "60% of the time, it works every time" as an aphrodisiac).
Guest star Matthew Broderick famously appeared in 'The Producers' with previous guest star Nathan Lane. Several references to the show are made in this episode.
At the silent auction of Ben's there is both a Royals and Chiefs jersey. Paul Rudd is a huge KC sports fan.