Despite their close friendship, Jack rarely addresses her as "Liz", generally preferring to call her by her surname. In the Season 5 episode "Mrs. Donaghy", the minister at Jack and Avery Jessup's wedding accidentally married Jack to Liz. Although they remain platonic, Liz and Jack are required to go to marriage counseling and realize the impact they have had on each other's lives in the past 5 years. In honor of his friendship with Liz and everything she has done for him, Jack gave his first-born daughter the name "Elizabeth", albeit using the nickname "Liddy" vice "Liz" in order to honor Liddy Dole, G. Gordon Liddy and Jack's martial arts instructor Lih De.