Only four actors played the same character in more than one episode of the series: Mark Donaldson (William the Conqueror) and Geoffrey Matthews (Ealdred, Archbishop of York) in The Saxon Dusk (1975) and The Conquerors (1975), Alfred Lynch (King James I) in A Rich and Beautiful Empire (1975) and America! America! (1975) and Bernard Hepton (Oliver Cromwell) in March On, Boys! (1975) and The Agreement of the People (1975).
The series takes place from 43 to 1834.