CREATE TABLE table_204_628 (id NUMBER, "trial number" CLOB, "date" CLOB, "name of trial" CLOB, "celebrity/ies taking part" CLOB, "winner/number of stars" CLOB, "notes" CLOB)

what was the total number of stars given for the thunderball challenge ?
SELECT "celebrity/ies taking part" FROM table_204_628 WHERE "name of trial" = 'thunderball'
SELECT "celebrity/ies taking part" FROM "table_204_628" WHERE "name of trial" = 'thunderball'