CREATE TABLE table_19957 ("Episode No." CLOB, "Episode Title" CLOB, "UK Broadcast Date" CLOB, "Presenter" CLOB, "Details of Journey" CLOB, "Countries Visited" CLOB)

What countries are visited in the episode presented by Brian B. Thompson?
SELECT "Countries Visited" FROM table_19957 WHERE "Presenter" = 'Brian B. Thompson'
SELECT "Countries Visited" FROM "table_19957" WHERE "Presenter" = 'Brian B. Thompson'