Iain De Caestecker. Actor: Marvel's Agents of S.H.I.E.L.D.. Iain De Caestecker is a Scottish actor. He went to Hillhead Primary School and successfully completed an HND in Acting and Performance at Langside College. He played the lead in two high-profile BBC series - BAFTA-winning The Fades and Young James Herriot (both 2011). The latter earned him a nomination for a BAFTA Scotland for Best Actor/Actress - Television. Psychological horror film In Fear...