Question: what is the number of original airdate written by Allan Hawco?
SQL: SELECT COUNT("Original airdate") FROM "1-27547668-4" 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 "1-27547668-4" WHERE "Written by" = 'John Callaghan';