Real Name: Unrevealed
Occupation: Prankster
Identity: Secret
Legal Status: Citizen of the United States with no criminal record
Former Aliases: None known
Place of Birth: Unknown
Marital Status: Single
Known Relatives: Katy (sister, deceased)
Base of Operations: Mobile
Group Affiliation: None
First Appearance: CAPTAIN AMERICA #307

History: The young man who would become Madcap was a devoutly religious person who belonged to a church group of an unspecified denomination. While he was on a church-sponsored field trip with his parents, sister, and about forty others, the bus he was riding in was struck by a tanker truck containing an unknown chemical compound concocted by the Advanced Idea Mechanics. This chemical, called Compound X07, apparently contained enzymes that promoted rapid healing in the human body. While everyone else was killed in the crash and subsequent explosion, the man who would become Madcap was thrown clear and lay for several hours unconscious in the rapidly evaporating pool of the chemical. After he gained consciousness in a hospital, his faith in a rational universe was shattered when he learned he was sole survivor of the accident.

Fleeing the hospital, he threw himself in the path of an oncoming car in a suicide attempt. To his surprise, he not only was incapable of feeling the pain of being hit by the car, but he also got up from where he was thrown, his injuries having healed in moments. Rightly suspecting that the bus accident somehow endowed him with his immunity from pain and injury, he was driven further into madness. He could not understand why he should benefit from an accident that killed forty people including his friends and family. He finally came to the conclusion that things happen without cause and effect and that there is no purpose in anything.

He also soon discovered that he could cause whoever looked him in the eye long enough to act crazily. Lacking anything better to do, he bought a toy soap bubble-making gun from a dime store and stole a harlequin outfit from a costume shop. Calling himself Madcap, he decided to wander New York City and randomly cause people to go crazy in order to demonstrate to them the meaninglessness of existence. On one of his first excursions, he encountered the fledgling crimefighter Nomad, who at that time was Captain America's partner. Nomad eventually befriended Madcap in order to try to understand his origins, motives, and capacities. When Madcap began threatening lives, Nomad was forced to subdue him. Madcap was then put in to Bellevue Hospital in New York to undergo psychiatric treatment.

Madcap escaped from psychiatric care and became a host (with the use of his Emotion Control powers) of the Madcap Mystery Hour on a New York television station. He encountered the young heroes Power Pack and encouraged them to go on an adventure with him, but the adventure turned dangerous, and the Power Pack ended it.

Height: 5 ft. 9 in.
Weight: 145 lbs.
Eyes: Blue
Hair: Brown

Strength Level: Madcap possesses the normal human strength of a man of his age, height, and weight who engages in manic regular exercise.

Known Superhuman Powers: Madcap possesses two separate superhuman powers. The first is his ability rapidly to heal his own wounds of the flesh, bone, and tissue. The full extent of this capacity is not known. Madcap has been observed to mend broken bones rapidly, expel bullets lodged in him, and recover from a variety of lacerations and puncture wounds. It is not known what would happen were he dismembered (the generation of a new limb is a possibility) or burned beyond recognition, it is also not known if he can regenerate brain cells were he to sustain an injury to the brain. Apparently he cannot heal the damage done to most of his body's nerve endings that results in his inability to perceive pain. The extent of his tactile sensations is also unknown.

Madcap's second superhuman power is the ability to psionically stimulate the inhibition centers in other human beings' brains. By stimulating them, he can cause other people to act in a generally euphoric, uninhibited, outlandish manner. He cannot control the type of behavior his subjects will exhibit; that is dictated by the subjects' own psyches. Apparently a person must establish eye contact with Madcap in order for him to affect his or her brain. It is not known precisely how long a person will be prone to aberrant behavior from a single stimulation of one second's duration. This also may be determined by the individual's psyche and normal inhibition level. Madcap's victims have been observed to act crazily for fifteen minutes to a half hour after a single stimulation. If Madcap were to repeatedly stimulate someone before the effect of the first stimulation wore off, he could keep them acting crazily indefinitely.