"Marvel's Agents of S.H.I.E.L.D." stars Clark Gregg as Agent Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Grant Ward, Chloe Bennet as Skye, Iain De Caestecker as Agent Leo Fitz, Elizabeth Henstridge as Agent Jemma Simmons and Nick Blood as Lance Hunter.
Guest starring are B.J. Britt as Agent Antoine Triplett, Adrian Pasdar as Brigadier General Glenn Talbot, Ruth Negga as Raina, Henry Simmons as Alphonso "Mack" Mackenzie, Wilmer Calderon as Idaho, Kyle MacLachlan as The Doctor, Brian Patrick Wade as Carl Creel, Simon Kassianides as Sunil Bakshi, Carolina Espiro as waitress and Cutter Garcia as bartender.
"Heavy is the Head" was written by Paul Zbyszewski and directed by Jesse Bochco.