CREATE TABLE "table1_19422702_1" (
  "no_in_season" real,
  "no_in_series" real,
  "title" text,
  "canadian_airdate" text,
  "us_airdate" text,
  "production_code" real
);

Question: What is the latest season number for a show with a production code of 816?
SQL: SELECT MAX("no_in_season") FROM "table1_19422702_1" WHERE "production_code"=816;

Question: How many U.S. air dates were from an episode in Season 4?
SQL: SELECT COUNT("us_airdate") FROM "table1_19422702_1" WHERE "no_in_season"=4;