Though Samantha appears in the story, she has no lines, because the script this is based on had only two characters (Jughead and Uncle Herman), and all their lines go to Bingo and Uncle Herman, respectively.
This is the first appearance of Bingo's Uncle Herman. His design is completely different from Jughead's uncle of the same name, though in later comics, this Uncle Herman would become Jughead's as well (thus making Bingo and Jughead into cousins).