Marcus Pierce

Cain, more commonly known by his current alias Lieutenant Marcus Pierce, is the main antagonist in the third season of the FOX comedy-drama TV series, Lucifer.

He is an ancient immortal man cursed to walk the world for eternity for murdering his brother, Abel. Eventually, getting absolutely bored with living forever, Cain made it his sole purpose to find a way to finally die.

He is portrayed by Tom Welling, who is best known for previously playing Clark Kent in Smallville.

Biography
Cain was born thousands of years ago along with his brother, Abel, whom he eventually killed and became the world's first murderer. Angered, God sent Amenadiel to mark Cain which cursed him with immortality and left him to walk the Earth for eternity. Over the years, Cain watched everyone he cares for die, did everything there is to do (sex, music, sport, food, etc.) and went to every place there is to go.

Eventually, nothing Cain and grown completely bored of not dying, he made it his sole purpose to find a way to die. He tried every method of dying "since the Bronze Age", including jumping in a volcano, getting chopped by chainsaw, devoured by wolves, dropping in helicopter blades, killed by demon blades forged in hell, grenade down the throat, dipping in an acid bath. But no matter what he did, he kept healing from any method he tried. He also kept an eye on every Celestial that ever visited Earth, including Lucifer Morningstar, Amenadiel, Mazikeen, Goddess and Gaudium.

Sometime in the 20th century, Cain met a boy who he later mentored into the crime lord known as "the Sinnerman". Eventually though, the Sinnerman went rogue on him, prompting Cain to kill him. At some point, Cain changed his name to "Marcus Pierce" and went under the guise of a police lieutenant. After learning that LAPD detective Chloe Decker can make the devil bleed, believing that it could do the same with him, he traveled to Los Angeles to test this theory.

Kidnapping Lucifer Morningstar
Needing Lucifer out of the way in order to test his theory, Pierce hired someone to kidnap Lucifer when Chloe was nearby and had him left at the desert. However, as much as a surprise to Pierce, Lucifer returned earlier than he predicted with his angel wings fully restored. But, still confident that this wouldn't be much of a problem, Pierce continued forward with his plan.

Meeting Lucifer Morningstar
to be added

Personality
At first shown, Cain, as Marcus Pierce, is shown to be strategic, reserved and well-respected. Like Lucifer, he is charming, charismatic and handsome. He appeared to have a disdain for cops who have previously committed crime and immediately took a disliking to Dan for his past actions of assisting Malcolm Graham. He also appeared to have a dislike towards Lucifer as he deems him reckless and later calls him an idiot for going after the Sinnerman. He also appeared to be compassionate as he told Lucifer to keep Chloe Decker out of their search for the Sinnerman so they would not put her daughter Trixie's life in danger. Pierce claims to have an admiration for Chloe as a detective, as he says the only reason he arrived at Los Angeles was so he could finally see her in action firsthand.

However, it is shown that a considerable amount of Cain's persona as Pierce is an act, as he only wanted Chloe Decker and Lucifer Morningstar to stay away from the Sinnerman fearing that it could trace back to him. Pierce admitted to Lucifer that Sinnerman was his friend and right-hand man, but that he killed him because he went rogue and had to be "taken out". It is also proven that he his apparent admiration of Chloe was nothing more than a mere lie as while he did come for Chloe, it had nothing to do with her detective skills, but rather because he knew she made the devil vulnerable and only wanted to see if it worked on him as well. He also appeared to have shown no remorse for killing his brother Abel, as he even compared it to Amenadiel's previous actions of trying to kill Lucifer.

Pierce's greatest desire is to finally die, to get rid of his curse of immortality. He is tired of being alive. In his words, "I've walked this Earth for thousands of years. I have seen everything, I have done everything. I have watched everything I've ever known turn to ashes over and over again." Pierce agrees to Lucifer's comparison to it being like Hell. He is very determined in his goal, as shown by his multiple, and often extremely painful, attempts at suicide. Pierce also claimed to Amenadiel that, if it helped him find peace, he would have no problem murdering an innocent. This shows that when it comes to achieving his desire to die, he is willing to take any action, no matter how ruthless.

Powers

 * Immortality: Being his most notable power, Cain was cursed by God with immortality for murdering his brother. Hence he is unable to die, including being unable to age even after thousands of years. He can be wounded and killed by any normal human, but when he is killed, he resurrects himself after a short amount of time. He can even survive being wounded by demon blades forged in hell, which even angels cannot do.
 * Healing factor: Cain's body constantly heals from any wounds he is inflicted with. While injuries take time to heal, they seem to heal at an accelerated rate compared to regular humans. Any tattoos or scars fade after a few months. He can even regenerate from being cut in half, melted in an acid bath, and being engulfed by molten lava.

Abilities

 * Marksman: As a trained member of the police, Cain has expert ability with firearms. He was able to shoot the Sinnerman multiple times while Lucifer was in close proximity with his target without hitting Lucifer with any stray bullets.
 * Arcane Knowledge: As an ancient human that has lived since the dawn of humanity, Cain has a wealth of knowledge. He is aware of Lucifer's true identity and has been tracking Celestials when they come to Earth.
 * Expert Combatant: Cain was shown to be very capable in hand-to-hand combat, able to hold his own against Amenadiel fairly well.

Season 3

 * "They're Back, Aren't They?"
 * "The One With the Baby Carrot"
 * "Mr. and Mrs. Mazikeen Smith" (unseen)
 * "What Would Lucifer Do?"
 * "Welcome Back, Charlotte Richards" (mentioned)
 * "Chloe Does Lucifer" (mentioned)
 * "The Sinnerman"
 * "The Sin Bin"
 * "All About Her"
 * "Til Death Do Us Part"
 * "My Brother's Keeper"

Trivia

 * In the Bible, Cain is the son of Adam and Eve where he murdered his brother Abel out of jealousy and was punished to walk the Earth forever and unable to die.
 * Through his immortality, Cain did everything a person could do, legal and illegal.
 * Whether this makes his immune system repel infections from common colds to cancer and STDs hasn't been confirmed.
 * His memory appears to be able to retain centuries of experience, including languages, matrial arts, and his suicide attempts.
 * He likely established the Sinnerman crime boss identity to hide behind to wait out a few decades before choosing a new name and relocating.
 * He finds his punishment unnecessarily cruel as murder is committed by other humans. Even fratricide is not unheard of.