 Meanwhile, Jack Donaghy (Alec Baldwin) is preparing to give a speech at the Waldorf-Astoria.While giving a blood donation, Liz reveals that she plans to break up with her boyfriend, Dennis Duffy (Dean Winters).On the way to her office, she runs into Jenna Maroney (Jane Krakowski) who reveals that Jack has "bumped" her from appearing on "Late Night with Conan O'Brien."