Chi Lewis‑Parry transitioned from a decade‑long MMA career (2012–2020) into acting after the COVID lockdowns, debuting in supporting television roles before collaborating with director Danny Boyle on the miniseries Pistol. Boyle invited Lewis‑Parry to audition for an untitled project by asking him to “terrify me”; Lewis‑Parry sprinted at him in character, securing the role of Samson, a new infected Alpha in 28 Years Later. His working methods combined physical performance, prosthetic integration, and emotional intention: he tracked experiences in a personal diary, proposed that the character express disgust at military violence, and collaborated with Boyle to build a back‑story expressing both monstrous strength and emergent emotional depth. On set he recorded voice for multiple infected and shared workouts off‑camera with co‑star Ralph Fiennes, evolving the role across formats of film performance and vocal expression.