S6, E6: Continuing his new role as caretaker for a disabled Marilyn (guest star Blythe Danner), a resentful Will (Eric McCormack) takes his wheelchair-bound mother for an afternoon roll in the park and bumps into an attractive bachelor Tom (Emmy-nominated guest star Dylan McDermott, "The Practice") wheeling an invalid of his own. Using his mother as a reason for a daily rendezvous in the park, Will attempts to build up the courage to ask Tom out. Elsewhere, Karen continues her lifelong quest to hunt down hubby-stealing Lorraine tracking her to a room at the Peninsula hotel only to discover occupant to be her father Lester (Oscar-nominated guess star John Cleese, "A Fish Called Wanda"). Sean Hayes, Debra Messing and Shelley Morrison also star.