Plot: Phil Donahue and Marlo Thomas on their new book (What Makes A Marriage Last: 40 Celebrated Couples Share with Us the Secrets to a Happy Life). Plus, Love during Lockdown: creative weddings while in quarantine, including a virtual wedding officiated by Tamron during the show; celebrity wedding planner Jung Lee gives a virtual consultation to the couple; newlyweds stuck in Peru on their honeymoon; and tips to keep the spark alive while in quarantine