Struck down by the flu, Frasier is too ill to do his daily radio advice show, so his brother, Niles (David Hyde Pierce), offers to fill in -- with great trepidation. Despite an early attack of stage fright, Niles performs brilliantly on the air. In fact, he performs a bit too brilliantly to suit Frasier, who now fears that Niles will end up taking over his job on a permanent basis. The paranoia becomes as thick as pea soup when food critic Gil Chesterton (Edward Hibbert in his series debut) enters into the equation. Listen for a veritable all-star roster of "guest voices" on this episode. ~ Hal Erickson, Rovi