Mower's given date of birth of September 12th 1940 is called into question in his 2007 autobiography 'My Story'. His birth went unregistered by his family and he later found out he may have been born on September 12th 1938 or possibly 1939.
Location of birth sometimes given as Pontypridd, South Wales.
Graduated from RADA.
Became an Associate Member of RADA.
Considered for the roles of Caine, Dr. Armstrong, Dr. Bukovsky, Lamson, Roger Derebridge and Kelly in Lifeforce (1985).
Before he became an actor he qualified as an engineering draughtsman,.
According to director Matthew Robinson on the Doctor Who (1963) Resurrection Of The
Daleks DVD, Mower was the original choice for Colonel Archer (played by
Del Henney) in this 1984 serial.