CREATE TABLE "table1_14330096_4" (
  "totalnum" real,
  "seriesnum" real,
  "title" text,
  "writer" text,
  "director" text,
  "original_air_date" text
);

Question: What is the highest total number?
SQL: SELECT MAX("totalnum") FROM "table1_14330096_4";

Question: How many of the episodes have Roger Goldby as the director?
SQL: SELECT "totalnum" FROM "table1_14330096_4" WHERE "director"='Roger Goldby';

Question: Which episodes have Patrick Lau as the director and Lisa Holdsworth as the writer?
SQL: SELECT "title" FROM "table1_14330096_4" WHERE "director"='Patrick Lau' AND "writer"='Lisa Holdsworth';