Catalan will play on Saturday night regardless of whether they finish 5th or 6th:

Fri 16 Sept QPO1 Warrington v HUDDERSFIELD GIANTS LIVE Kick Off 8:00pm
Sat 17 Sept EPO1 Catalan v Hull KR LIVE LIVE Kick Off 6:45pm
Sun 18 Sept QPO2 Wigan v St Helens. Kick Off 2:45pm
Sun 18 Sept EPO2 Leeds v Hull FC LIVE Kick Off 5:15pm

Fri 23 Sept Huddersfield v Leeds or Catalan
Sat 24 Sept Saints or Wigan v Catalan or Hull