Jacob "Jake" Ripkin Broadsky or The Left Hand of God was the main antagonist of season 6.
Jacob Ripkin Broadsky is a sniper-turned-assassin associate of Booth's who shot and killed the Gravedigger, a serial killer, with a handmade .338 Lapua Magnum in "The Bullet in the Brain". One of the best and most highly trained snipers in the world, Broadsky was a recurring character in Season 6 as the "Anti-Booth" just as the Gravedigger was the Anti-Brennan. After being identified as the killer, he went on the run and essentially became a serial killer in his own right who kills people he arbitrarilly deems unfit without going through a trial.
Broadsky served in the Gulf War, training counter-snipers. Afterwards, he moved to a hostage rescue unit in Texas. A year later, he was indicted for murder after going rogue during a mission, shooting and killing a masked gunman before he got the official go-ahead. He asserted that he had done it to save the hostage's life and done so within the restrictions of his job description, but his superiors thought otherwise and called it murder. Before he could be charged, he went into hiding.
In "The Killer in the Crosshairs" he kills Walter Coolidge, a counterfeiter who recently escaped the justice system for his part in the murder of three undercover cops, inciting Booth and Brennan to try and stop him before he strikes again. They determine that he has a girlfriend in the U.S. Marshall office that is providing the names of all his victims and her name is Paula Ashwaldt. Because they caught her she kills herself and Broadsky blames Booth. He attempts to kill Gregory Allen, a crooked cop who took a bribe from a drunk driver to cover the death of a mother and two children, but is stopped by Booth and his rifle is destroyed as a result.
In "The Hole in the Heart" Broadsky tries to kill Booth in the Jeffersonion Lab (using an infrared scope to see body heat thorugh the wall). However, he accidentally kills Vincent Nigel-Murray, when Murray answers Booth's phone while Booth is attempting to set up a tracking system to trace Broadsky's location. By the end of the episode, Booth is able to capture Broadsky. Tracking him to the docks, they engage in a sniper-to-sniper fight where Jacob's broken hand would put Jacob at disadvantage, but he has the high ground. Booth incapacitates Jacob, shooting him in the leg, and keeps him alive by stepping on his wound until the paramedics arrive.
Broadsky: Don't you forget that you never see the bullet that takes you down.
Broadsky found potential targets, who were usually criminals, and got access to the first two with help from Paula Ashwaldt. Afterwards, he would call an enemy of the target who would be willing to pay to have that person eliminated and name a price. When they accepted, he would kill the target by shooting him/her with his rifle, which was loaded with copper bullets made by Broadsky himself.
- Unnamed gunman
- Tracy Leveque (stabbed in the neck; killed for access to her apartment)
- Heather Taffet, the Gravedigger
- Walter Coolidge
- Gregory Allen (attempted to kill with an exploding bullet, but was saved)
- Matt Leishenger (beaten and his throat slashed; killed for his rifle and work access card)
- Vincent Nigel-Murray (killed thinking he was Booth)
- James Kent (hired him to kill Heather Taffet)
- Raul Ortiz (hired him to kill Walter Coolidge)
- Unknown client (hired him to kill Gregory Allen)
- Paula Ashwaldt (got information about targets from her)
- Benny Winkler (made him customized weapons and ammo)
- It should be noted that during his killing spree he actually killed more innocent people than criminals.
- It was never revealed what happened to the land the Broadsky purchased in Booth's name. More than likely it was seized by the F.B.I.
- To date, Broadsky is the first recurring antagonist to survive his story arc. The second is Glen Durant.
- Broadsky could be considered as both the Anti-Booth just as Heather Taffet was regarded as the Anti-Brennan, but can also be seen as the Ra's Al Ghul to Seeley Booth's Batman (Based on the Nolan films), as Broadsky taught Booth all that he knows but considered himself above the law and went rogue killing those he viewed as criminals.
- In The Movie in the Making, Arastoo mentioned Broadsky as a Serial Sniper when he explained Vincent Nigel-Murray's death while standing next to Vincent's commemorative plaque.