They did. It was "SAVE ME D" and that was what we saw. The "D" meant to throw us into speculating it was "Dr" or possibly "Dan" but in all likelihood it was "Daughter." Also... Spoiler The lyrics to Bowie's "Life on Mars" are eerily parallel to Angela's story. I don't know if that's intentional (it has to be) but it's yet another level of meta-genius that this show has going for it.