|

|
Name
|
Mr. Murdo
|
A.K.A.
|
n/a
|
Secret ID.
|
Unknown
|
Type
|
Costumed Hero
|
Affiliation/Team
|
None
|
1st Appearance
|
Atomic Thunderbolt #1 (One-shot)
|
Year
|
1946
|
Publisher
|
Regor Company
|
Country of origin
|
USA details missing
|
|
No information at present.
|

|
Name
|
Mr. Muscle
|
A.K.A.
|
n/a
|
Secret ID.
|
Mike O'Leary
|
Type
|
Costumed Hero
|
Affiliation/Team
|
None
|
1st Appearance
|
Dynamic Comics #1
|
Year
|
1945
|
Publisher
|
International Publications
|
Country of origin
|
UK
|
|
Mike O'Leary drinks the "essence of strength" to become "Britain's Superman". Powers include Strength enough to lift a car, and super-eyesight.
|

|
Name
|
Mr. Mystic
|
A.K.A.
|
Kardak the Mystic Magician (Thanks to Rik for sorting this out for me)
|
Secret ID.
|
John Cardy or possibly Ken (no surname)
|
Type
|
Magician
|
Affiliation/Team
|
None
|
1st Appearance
|
Top-Notch Comics #1
|
Year
|
1939
|
Publisher
|
MLJ /Archie Comics
|
Country of origin
|
USA
|
|
Trained in Tibet by the Seven Lamas, 'Ken' travels back to the USA endowed with magical powers to fight the forces of evil. With the ability to transform himself into animals and to grow to giant or minute sizes among just some of his powers, this strip differed from both Lady Luck and The Spirit in that this was a hero who had superpowers!
|

|
Name
|
Mr. Nobody
|
A.K.A.
|
n/a
|
Secret ID.
|
Unknown
|
Type
|
Costumed Hero
|
Affiliation/Team
|
None
|
1st Appearance
|
Terrific Comics#1
|
Year
|
1944
|
Publisher
|
Holyoke / Tem Publishing
|
Country of origin
|
USA
|
|
Crime fighting cloak & dagger style vigilante
|

|
Name
|
Mr. Risk, The Man who knows no fear
|
A.K.A.
|
n/a
|
Secret ID.
|
None
|
Type
|
Non Costumed Hero
|
Affiliation/Team
|
None
|
1st Appearance
|
Super-Mystery Comics Vol 3 #2
|
Year
|
1942
|
Publisher
|
Ace Magazines (Periodical House)
|
Country of origin
|
USA
|
|
Mr. Risk was a stylish solver of mysteries. He had no superpowers, (according to the comic, "He's the guy that don't have no fear!") but was a master of disguise. He was assisted by his manservant, Abdul.
|

|
Name
|
Mr. Satan
|
A.K.A.
|
n/a
|
Secret ID.
|
Dudley Bradshaw
|
Type
|
Costumed Hero
|
Affiliation/Team
|
None
|
1st Appearance
|
Zip Comics #1
|
Year
|
1940
|
Publisher
|
MLJ /Archie Comics
|
Country of origin
|
USA
|
|
When Dudley Bradshaw donned a horned outfit from the local Fancy Dress costume shop, he became Mr. Satan and fought crime in his many travelling adventures.
|

|
Name
|
Mr. Scarlet
|
A.K.A.
|
n/a
|
Secret ID.
|
Brian Butler
|
Type
|
Costumed Hero
|
Affiliation/Team
|
Pinky (Side-Kick)
|
1st Appearance
|
Wow Comics #1
|
Year
|
1940
|
Publisher
|
Fawcett Publications
|
Country of origin
|
USA
|
|
Brian Butler, a District Attorney, is frustrated by his inability to put away all the bad guys and criminals, so at midnight every night he becomes the crime-busting costumed vigilante Mr. Scarlet. This has the unfortunate side-effect of putting him out of a job, as he’s too successful as Mr. Scarlet, so by day he looks for odd jobs to support himself and by night he fights evil as Mr. Scarlet. He is assisted by his secretary, Miss Wade, who knows who he is, and by his sidekick, the young boy Pinky. Mr. Scarlet has the ability to fly, although no origin for this ability is ever given.
|

|
Name
|
Mr. Terrific
|
A.K.A.
|
n/a
|
Secret ID.
|
Terry Sloan
|
Type
|
Costumed Hero
|
Affiliation/Team
|
Justice Society of America
|
1st Appearance
|
Sensation Comics #1
|
Year
|
1942
|
Publisher
|
National Periodical Publications (DC)
|
Country of origin
|
USA
|
|
Terry Sloan is a bored millionaire who has conquered every possible field there is. He is so bored, in fact, that he decides one day to commit suicide. He sees someone else about to do so and stops them, and after finding out their troubles helps them out. He then decides to help people by fighting crime, emphasizing the ideal of fair play with the words plastered across his costume. He has no superpowers, but is a prodigy at everything he does; and is the "best in the world" at everything, from being an architect to a hypnotist.
|

|
Name
|
Mr. Twilight
|
A.K.A.
|
n/a
|
Secret ID.
|
Kenshaw Reed
|
Type
|
Unknown
|
Affiliation/Team
|
None
|
1st Appearance
|
Super Magician Comics vol3 #5
|
Year
|
1944
|
Publisher
|
Street & Smith
|
Country of origin
|
USA details missing
|
|
Only appearance.
|

|
Name
|
Mr. Whiskers
|
A.K.A.
|
n/a
|
Secret ID.
|
Unknown
|
Type
|
Unknown
|
Affiliation/Team
|
None
|
1st Appearance
|
Four Favourites Comics #3
|
Year
|
1941
|
Publisher
|
Ace Magazines (Periodical House)
|
Country of origin
|
USA details missing
|
|
Two appearances only; Four Favourites #3 and #4.
|



|
|
|