Jo speaks to an unseen journalist called Frank Fontana on the phone. Frank Fontana was a main character in "Murphy Brown (1988)", played by Joe Regalbuto, where he was an investigative journalist.
At the 3:43 mark, Jo realizes that it is 3:10AM. This is at least the third episode in which she has had a scene where a clock showed that time. The first instance is at the 0:31 mark in Ep 1:1. Another is at the 1:20 mark in Ep 1:2.