Gavin MacLeod and Marion Ross host a Christmas celebration that features classic performances of popular holiday standards and traditional carols performed, throughout decades past, by an array of artists, including Andy Williams, Bing Crosby, Perry Como, Johnny Mathis, Brenda Lee, Eddy Arnold, Nat King Cole, Judy Garland, Mitch Miller and the Gang, Gene Autry, Jimmy Boyd, the Supremes, Rosemary Clooney, the Lennon Sisters, Burl Ives, Mahalia Jackson, Mitzi Gaynor, Julie Andrews, the Beach Boys,...