Grant Vyro is a character portrayed by Nathaniel Marston in the ABC crime series Castle. Vyro was a dockworker masquerading as Donny Hayes, a trick that became harder to pull off once Donny was floating in the East river at the start of "Last Call". Vyro purchased Hayes' union card for $25,000, paid by check, which struck Beckett as suspicious, until Donny's rapid purchase of The Old Haunt came to light, explaining the sudden need for liquid assets. Vyro alibied out, although presumably he could not have resumed the "Donny Hayes" persona.