Data courtesy of the Grand Comics Database under Creative Commons license.

Issue Details

Issue	#1
Published	April 1940
Cover Price	0.10 USD
Pages	68
Editing	Ned Pines

Cover Details

Characters	Major Mars
Pencils	L. North
Inks	L. North

11 page Mask story "The Mask Strikes"

Characters	The Mask [Tony Colby] (first appearance; origin); Silk Davis (first appearance); Carol Smith (first appearance); Olly Snate (first appearance; villain)
Script	Raymond Thayer?
Pencils	Raymond Thayer
Inks	Raymond Thayer
Colors	Raymond Thayer?

12 page Major Mars story "The Beast Plague From Jupiter"

Characters	Major Mars (first appearance); Grag (first appearance; a robot); Joan Jilson (first appearance); The Space Emperor ([Kells] (first appearance; villain)
Pencils	Max Plaisted
Inks	Max Plaisted
Notes	only appearance

6 page Sgt. Bill King story "In No-Man's-Land"

Characters	Sgt. Bill King (first appearance); Nazis (villains)
Pencils	Leonard Sansone
Inks	Leonard Sansone

8 page Jim Hatfield story "The Black Inferno"

Characters

Jim Hatfield (first appearance; a Texas Ranger); Capt. McDowell (first appearance); Padre Borasho (first appearance; villain; death); Sen. Crocker (first appearance; villain); Slade (first appearance; villain)

6 page Gunner Thompson story "Payoff In Lead"

Characters

Gunner Thompson (first appearance; only appearance)

10 page Hy Hardy story "Deep Sea Drama On Parade"

Characters	Hy Hardy (first appearance; only appearance)
Pencils	Ken Browne
Inks	Ken Browne

1 page text story "A Real Waddy"

Script	Sam Brant
Letters	typeset

7 page Dan Williams story "The Forbes Case"

Characters	Dan Williams (first appearance); Caroline Forbes (first appearance); John Blodgett (first appearance; villain)
Pencils	Ray Lowry
Inks	Ray Lowry

2 page Make-Believe Mickey story "I'm gone on a trip around the world..."

Characters	Make-Believe Mickey (first appearance)
Script	Klaus Nordling
Pencils	Klaus Nordling
Inks	Klaus Nordling
Colors	Klaus Nordling