CREATE TABLE table_204_494 (id DECIMAL, "episode #" TEXT, "original air date  ( uk ) " TEXT, "episode title" TEXT, "guest cast" TEXT, "dvd # 1" DECIMAL)

what is the date of the first episode ?
SELECT "original air date (uk)" FROM table_204_494 WHERE id = 1
SELECT "original air date (uk)" FROM "table_204_494" WHERE "id" = 1