On a third trip abroad in 1582, Parry appears to have become a double agent, going over to the Catholic side and considering Elizabeth's assassination. He began by urging a policy of conciliation towards Catholics in England, and recommending pardon for some prominent catholic refugees, including John and Thomas Roper, Sir Thomas Copley, and Charles Neville, 6th Earl of Westmorland. He then encountered Charles Paget and Thomas Morgan of Llantarnam, and read works of Cardinal William Allen. He sought approval for an assassination scheme in various Catholic quarters, in France and Italy.