Only Jonny Double tryout issue. Created by Len Wein and Marv Wolfman. Marv Wolfman in Alter-Ego #113 (October 2012) says that originally Johnny Double was to disguise himself as a potential victim of assignation or murder. That concept later became the Human Target.
The central drawing of Johnny Double was drawn by Jack Sparling. It first appeared as a promo piece (signed by Sparling) in On The Drawing Board Vol 3, No 4 (aka The Comic Reader #68 [July 1968]). Info per Nick Caputo.
"A down-beat Don Quixote... a once-white knight in counterfeit armor, the poor man's Peter Pan!" Jonny Double, ex-cop and now PI, is awoken only to be ejected by his landlord. Relocating, he gets a call. Mr. Twain has the picture of his twin brother, a syndicate man who was murdered. Jonny demands $200/day, settles for $50, then bums cigarettes and bullets from his contacts asking about the syndicate. He's jumped by goons and pounded, and paid off with a quarter!
Crystal "Crys" Cross (a waitress); Piker (a syndicate man); more goons
Beaten, Jonny gets sympathy from "Crys" Cross, a blonde waitress. Mr. Twain's brother dealt with Piker and Glass, respectable businessmen. Jonny goes to their office, is turned away, but disguises as a janitor to slip in. He eavesdrops on (Piker or Glass) ordering Mr. Twain's death. As for the "peeper", Jonny Double has only "stupid, dumb luck". Then he's spotted, beaten again, and dragged to the roof to be pitched over!
Jonny kicks back, and the goon goes over the rail to a fatal fall. More goons pursue. Jonny runs into an amusement park, then the House of Horrors. Running past horror masks, Jonny is trapped in the Hall of Mirrors. The goon shoots wild. "I'll get ya, Double!" Jonny moves in and pounds the goon flat. The barker even shows him automatic pictures taken inside. "Send a set to Lt. Branigan C.O.D, with love and kisses from Jonny Double." The End
Jonny calls Mr. Twain to collect his fee. "Have to wait until Monday." "Aahh, beans!" And the sign painter demands to get paid, or he'll "take the door with me." Jonny narrates, "I'll show [them]... I won't be a loser all my life! This isn't... The End!