CREATE TABLE "season_19_1973_74" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "director" text,
  "writer_s" text,
  "airdate" text
);

Question: name the most series number for season 22
SQL: SELECT MAX("series_num") FROM "season_19_1973_74" WHERE "season_num"=22;