|Affiliation:||British Secret Service|
|Portrayed by:||B.J. Ward|
|Only Appearance:||The Lion and the Unicorn|
|Appears in:||1 Episodes|
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 showed up. None of the heads was very keen on sharing secret information, but when Batman promised them he could get Red Claw, they pointed him towards Castle Blairquhan, Britain's last land based missile silo.