The credit song for Season 1, Episode 1 was Dave Edmunds' cover of Elvis Costello's Girls Talk. For the series finale, the closing credits song is Tegan And Sara's cover of the same song.
Midge and Susie watching Jeopardy! (1984) together is a tribute to Mel Brooks and Carl Reiner, who watched Jeopardy together every night.
Abe refers to the person who fetches cabs as 'Antonio.' This is obviously a nod to his character from Wings.