garrett: finally tonight, cbs s steve hartman goes on the road to revisit a touching story of true love that blossomed through sickness, and in health. oh, my for, let s feigned the picture reporter: peter and lisa marshall of andover, connecticut are paging through the most memorable day of their lives. it was unforgettable. reporter: but, he s forgotten it. he has forgotten it. it s the saddest part, because you want to reminisce and you re alone in the memory. reporter: as we first reported a couple years ago, peter was diagnosed with early-onset alzheimer s. eventually, he not only forgot his wedding day, he forgot his wife. lisa became just another nameless caretaker. and yet, a whisper of their love must have remained. because lisa says all of a sudden, he began courting her!
as if they d just started dating. until one day, a wedding scene came on tv. peter pointed to the screen and said, let s do it. and i said, do what? and he pointed again. and i said, do you want to get married?! and he got this grin on his face, and he said, yeah. so, he fell in love with me again. (wedding music) unforgettable lisa accepted his proposal, and staged a wedding for her already-husband. i can t even describe to you how magical it was. he was so present, and it was very touching. peter, you may kiss the bride. reporter: lisa says peter hadn t been this lucid in weeks. it was a cinderella moment. the clock struck 12, and by the next morning, this wedding, too, was lost to the fog. but, lisa says, she fully expected that. i m the one who s going to remember that.
and that s going to help me heal later. reporter: unfortunately, later came. peter died about a year ago. lisa is now advocating for other alzheimer s patients and their families. she has also written a book called, oh, hello alzheimer s. i wanted people to understand the devastation of the disease, but, mostly, i want people to continue to find joy and really focus on being present with their loved ones. reporter: do that, and she says, alzheimer s will never defeat you. it ll just make your love all the more invincible. steve hartman, on the road, in andover, connecticut. garrett: one lesson listen for that whisper. that s tonight s cbs evening news. for norah o donnell, i m major garrett. good night.