Review: It might be impossible to navigate, but the show must go on. And so the Farndale Church Guild theater group — the British version of the five stooges, the reason directors take up knitting and which is pictured under incompetence in the dictionary — return in the Edge of the World Theatre’s production of David McGillivray and Walter Zerlin Jr.’s comedy, “They Came From Mars and Landed Outside the Farndale Avenue Church Hall in Time for the Townswomen’s Guild’s Coffee Morning.”