Complex sentence: His film appearances included; "The Dambusters" (1954) as Guy Gibson's rear gunner Flt Lt R.D. Trevor-Roper and "Private Potter" (1962) as the Brigadier.
Split into simpler sentences: His film appearances included "The Dam Busters" (1954), as Guy Gibson's rear gunner Flt. Lt. R.D. Trevor-Roper, and "Private Potter" (1962) as the Brigadier.