CREATE TABLE table_19693 ("Date" TEXT, "Episode" FLOAT, "Performer 1" TEXT, "Performer 2" TEXT, "Performer 3" TEXT, "Performer 4" TEXT)

Who was perfomer one on 30 January 1988?
SELECT "Performer 1" FROM table_19693 WHERE "Date" = '30 January 1988'
SELECT "Performer 1" FROM "table_19693" WHERE "Date" = '30 January 1988'