S4, E19: An excited Will (Eric McCormack) presents his newly reconciled parents (guest stars Sydney Pollack and Blythe Danner, "Meet the Parents") with a romantic cruise on their anniversary - but his idealistic plans are scuttled when he learns that each is hiding a secret. Meanwhile, due to Karen's (Megan Mullally) phobia about elevators, she and Jack (Sean Hayes) huff and puff their way up dozens of floors to the skytop restaurant while hefting the prized anniversary cake.