CREATE TABLE "table1_27547668_4" (
  "num" real,
  "no" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "viewers" real,
  "original_airdate" text,
  "prod_code" real
);

Question: what is the number of original airdate written by allan hawco?
SQL: SELECT COUNT("original_airdate") FROM "table1_27547668_4" WHERE "written_by"='Allan Hawco';

Question: what is the total number of films directy and written by john callaghan?
SQL: SELECT COUNT("directed_by") FROM "table1_27547668_4" WHERE "written_by"='John Callaghan';