The diner that Frank is eating breakfast at the start of the episode, is the same diner that is seen in Goodfellas (1990). In that film, it is used for the meeting between Ray Liotta and Robert De Niro, when De Niro's character finds out that Joe Pesci had been killed.
The poem that Frank recites at the beginning of the episode is an example of nonsense poetry and is a variation on an Old English poem called "Two Dead Boys."
C. Thomas Howell appeared in another Marvel property, The Amazing Spider-Man (2012), as Ray (Jack's father). The Punisher and Spider-Man frequently team up in comics.