Racing enthusiast Patrick Dempsey, star of ABC’s hit “Grey’s Anatomy,” Jeremy Clarkson, James May and Richard Hammond, hosts of the popular BBC series “Top Gear,” guest star on a new Grand Prix-themed episode of the Emmy Award-winning animated series “Phineas and Ferb,” premiering on Platypus Day, SATURDAY, MARCH 1 (8:00 a.m., ET/PT) on Disney XD. Following the episode will be a “Phineas and Ferb” marathon showcasing Agent P and his O.W.C.A. counterparts (8:30 a.m. – 12:00 p.m., ET/PT).
