CREATE TABLE table_17269 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Musical guest and song" TEXT, "Original air date" TEXT, "Production code" TEXT)

What's the musical guest and the song in the episode titled 'Checkmate'?
SELECT "Musical guest and song" FROM table_17269 WHERE "Title" = 'Checkmate'
SELECT "Musical guest and song" FROM "table_17269" WHERE "Title" = 'Checkmate'