CREATE TABLE table_name_42 (challenge_leader VARCHAR, time VARCHAR, date VARCHAR)

Who is the challenge leader that played on 9:30 pm on Wed., Nov. 28?
SELECT challenge_leader FROM table_name_42 WHERE time = "9:30 pm" AND date = "wed., nov. 28"
SELECT "challenge_leader" FROM "table_name_42" WHERE "9:30 pm" = "time" AND "date" = "wed., nov. 28"