Gary Payne is a member of Interchronological Rescue. He works with Grant Hodge. He is extremely muscular. He steals children from the past, way too recklessly so that it damages time, and brings the missing children of history to the twenty-first century. He was originally going to bring them to the future so that he could be rich.
His real name is Giuseppe Payne, but he goes by Gary.
In Revealed (Spoilers),
He and Grant Hodge are unaged into babies by Lindbergh, and currently live with Angela DuPre and Hadley Carreo, as Gregory and Henry