|Affiliations:||British Secret Service|
|Voiced by:||B.J. Ward|
M3 was one of the heads of British Secret Service.
M1, M2 and M3 were discussing the disappearance of Agent Frederick when Batman and Robin appeared before them. None of the heads was very keen on sharing secret information, but when Batman promised them he could capture Red Claw, they pointed him towards Blairquhan Castle, Britain's last land based missile silo.