Character biography
Nothing is initially known about Murdoc's childhood, but he later states that as a child he would rip the legs off spiders and then squish them for fun. He also claims his father was abusive and that he killed him.
When Murdoc was in his early 20s he failed the psychiatric tests when attempting to enlist in the Army, and started working within foreign militaries in order to fulfill his desire to shoot and kill people.
Eventually he was mentored by an assassin named Nicolas Helman, who Murdoc tells MacGyver and Jack Dalton he considers an even deadlier individual than himself. They end their partnership and later Murdoc accidentally killed Helman's wife during a shootout between them.
After becoming an assassin, but over a decade before his first encounter with MacGyver, Murdoc met a woman named Nadia who became pregnant with his child and fell in love with him while he only felt she was "less repulsive than most humans". Soon after giving birth to their child, Murdoc smothered her to death using a pillow, revealing she was his intended target all along.
MacGyver's first known encounter with Murdoc is when Murdoc was hired to assassinate MacGyver by an initially unknown individual. He is then known as the international assassin Suspect 218, until he is formally introduced in his meeting of MacGyver's roommate Wilt Bozer and later to MacGyver himself.
Murdoc is able to deceive Bozer long enough to enter MacGyver's home by pretending to be a "friend from work" there to see him. During a phone call MacGyver warns Bozer about Murdoc and his likely true intentions to kill him until Murdoc forces Bozer to end the call. Murdoc then subdues Bozer and uses one of Bozer's movie masks to hide his appearance when MacGyver returns. Murdoc is able to get the rest of MacGyver's Phoenix Team as hostages and demands that MacGyver surrender to him or he would kill the team. After a final showdown between the two, Murdoc loses and is arrested by the Phoenix Foundation. At this time he refuses to reveal any other identity, and states he is Murdoc; this is actually the name of a previous victim, but the only name he will give them.
Murdoc's next appearance is later that year; Riley Davis and Bozer visit him in prison to determine the identity of the mole within the Phoenix Foundation. Murdoc states he will not give them any information until they get him a rare first edition book. They do and Murdoc assists them by giving them all the information he has.
Murdoc later helps MacGyver to impersonate him in order to find an individual being targeted and the person requesting the assassination. During the course of this event it is revealed that the leader of Phoenix, Matilda Webber, had found out about his now teenage son, Cassian, who attends an exclusive private school in Switzerland. It is further revealed that while Murdoc does care for Cassian, sending him presents and keeping him safe, Cassian is unaware of his father's career as an assassin.
At the end of the first season it is discovered that Murdoc was able to secretly hire an assassin to enter the Phoenix Foundation headquarters in disguise to get revenge on MacGyver and team. While the entire team does survive the hired assassin, Murdoc is able to kill his prison guard and escape prison.
During their next encounter Murdoc drugs and kidnaps MacGyver, holding him in an abandoned warehouse basement and demanding to know Cassian's location. While MacGyver argues that Cassian would dislike him for what he has done, Murdoc responds saying "boys need their fathers" and uses MacGyver's recent searching for his father as proof. However, MacGyver refuses to disclose his location and eventually Murdoc leaves the room giving MacGyver an opportunity to escape through sewer tunnels. When the Phoenix Foundation agents arrive they find a picture of a man named Henry Fletcher and assume he is a new target. While the team is at the warehouse, Murdoc calls Samantha Cage on the phone and after a brief conversation about their similarities, including the use of false names (something her team seems unaware of), he shoots Cage with a sniper rifle. It is soon discovered that Cage was wearing a bulletproof vest and survives.
The team then determines that Fletcher is a professor who also is employed covertly as an assassin who makes his victims disappear. After arresting Fletcher, Murdoc frees Fletcher from a transport vehicle by using a rocket launcher, and leaves MacGyver trapped in the wreckage. After Murdoc rescues Fletcher, he requests that he be his first recruit into his "collective" of assassins.
After finding out Cage survived his earlier attempt to kill her, Murdoc makes a second attempt. This time he shot her at close range and left her to die alone. However, she was able to call MacGyver, who got her to a hospital where she recovered.
Later Henry Fletcher requests and succeeds in receiving $10 million to hand Murdoc over to the Phoenix Foundation. After trading, Helman shows back up seeking revenge for killing his wife and reveals that Murdoc's real first name is Dennis. Murdoc is able to get away while they are hiding and during a moment when MacGyver is left alone by Dalton, both Murdoc and Helman reappear and Murdoc shoots MacGyver in the shoulder to get him out of the way and then kills Helman. He then surrenders and requests to see his son in return for saving MacGyver's life. When he sees Cassian he asks him to put on an earlier present he sent him, headphones, and turn up his favorite song as loud as he wants. While his son is distracted he kills the guards using a pencil sharpener blade and flees with his son. He then drives to Fletcher's apartment and kills him after implying his plan is to kill all those members of his Collective that betrayed him.
