Ralph goes to a bar and asks for "Gin Gold". In the comics, Gingold was a soda made from gingo fruit, and Ralph got his powers from a super-concentrated extract of the gingo fruit.
By this point, Barry has been in prison for 20 days.
Ralph learns a new ability in this episode: he can shape-shift and imitate any person like his old partner Earl Cox, the Warden of Iron Heights, and Clifford DeVoe, which makes him similar to J'onn J'onzz, aka Martian Manhunter.
When talking to Barry, Becky states that "Orange isn't the new anything", a reference to the Netflix show Orange is the New Black.
This is the fifth episode of The Flash where Tom Cavanagh doesn't appear.