Here's some scoop on Marvel's Agents of S.H.I.E.L.D. from Entertainment Weekly's Natalie Abrams' The Spoiler Room column, which was posted on 2/24/17.
Is there any chance that Radcliffe could actually be Fitz’s father on Agents of S.H.I.E.L.D.? — Micah
I saw that theory on Reddit recently, so I took it to the source: “They’re both Scottish, and we’ve discussed it at length,” EP Jed Whedon says. “Truthfully, there’s no one better to play his dad than John Hannah, but no, Radcliffe is not his father.” There goes that theory!
Link to the full article:Spoiler Room: Scoop on 'Arrow,' 'Agents of SHIELD,' 'Blacklist' and more