In his capacity as Hubbard's biographer, Miller appeared in three British television documentaries:
- Facing South: The Cult Business broadcast on TVS (southern England regional TV), November 1987
- The Big Story: Inside the Cult made by Carlton TV and broadcast on ITV, July 13, 1995
- Secret Lives: L. Ron Hubbard made by 3BM and broadcast on Channel 4, November 19, 1997