"Homer's Barbershop Quartet" (season five, 1993) is the only episode where Homer's voice was provided by someone other than Castellaneta. The episode features Homer forming a barbershop quartet called The Be Sharps; and, at some points, his singing voice is provided by a member of The Dapper Dans. The Dapper Dans had recorded the singing parts for all four members of The Be Sharps. Their singing was intermixed with the normal voice actors' voices, often with a regular voice actor singing the melody and the Dapper Dans providing backup.