CREATE TABLE table_12697 ("Season" FLOAT, "# of Episodes" FLOAT, "Host" TEXT, "Mole" TEXT, "Winner" TEXT, "Runner-up" TEXT, "Destinations" TEXT)

Which Season has a Mole of frederique van der wal?
SELECT MAX("Season") FROM table_12697 WHERE "Mole" = 'frederique van der wal'
SELECT MAX("Season") FROM "table_12697" WHERE "Mole" = 'frederique van der wal'