This week may see the birth of an historic peace agreement in Northern Ireland, but will Sinn Fein and the IRA be part of it? Peter Taylor investigates whether Gerry Adams and Martin McGuinness are likely to accept or reject the settlement on offer and Panorama asks whether rejection would mean an end to the IRA's ceasefire.

(Note: as Panorama is topical and likely to react to events in the news, its subject matter may change)