CREATE TABLE table_37305 ("7:00" TEXT, "7:30" TEXT, "8:00" TEXT, "8:30" TEXT, "9:00" TEXT, "9:30" TEXT, "10:00" TEXT, "10:30" TEXT)

What is on the at 8:00 on the same channel that has Costello on at 8:30?
SELECT "8:00" FROM table_37305 WHERE "8:30" = 'costello'
SELECT "8:00" FROM "table_37305" WHERE "8:30" = 'costello'