CREATE TABLE table_20418 ("Episode Number" FLOAT, "Air Date" TEXT, "Guest Host" TEXT, "Musical Guest  ( Song performed ) " TEXT, "Who knows the most about the guest host? panelists" TEXT)

Name the most episode numbers of 6 january 2006
SELECT MAX("Episode Number") FROM table_20418 WHERE "Air Date" = '6 January 2006'
SELECT MAX("Episode Number") FROM "table_20418" WHERE "Air Date" = '6 January 2006'