Which episode in Garfield episode 1 is the worst pizza in the history of mankind?
CREATE TABLE "table1_1852270_6" (
  "episode" text,
  "garfield_episode_1" text,
  "u_s_acres_episode" text,
  "garfield_episode_2" text,
  "original_airdate" text
);
SELECT "episode" FROM "table1_1852270_6" WHERE "garfield_episode_1"='The Worst Pizza in the History of Mankind';