What is the date of the episode with Ryan Stiles as performer 2, Colin Mochrie as performer 3, and Tony Slattery as performer 4?
CREATE TABLE "series_5" (
  "date" text,
  "episode" real,
  "performer_1" text,
  "performer_2" text,
  "performer_3" text,
  "performer_4" text
);
SELECT "date" FROM "series_5" WHERE "performer_2"='ryan stiles' AND "performer_3"='colin mochrie' AND "performer_4"='tony slattery';