10x1 25 Sept 2011 Countermeasures Horatio and Natalia's lives hang in the balance, as Horatio stands between Natalia and certain death. Meanwhile, it's a race against time for the team to capture escaped killer Jack Toller before he kills again. 10x2 2 Oct 2011 Stiff The discovery of a strange murder weapon leads the CSIs into the world of gigolos. 10x3 9 Oct 2011 Blown Away A tornado touches down on a murder scene, damaging the evidence and putting Ryan and Walter in grave danger. 10x4 16 Oct 2011 Look Who's Taunting Horatio and his team are hunting a sadistic psychopath who tortures women - and one of them may still be alive. 10x5 23 Oct 2011 Killer Regrets Mexico's deadliest assassin is a target in Miami. Horatio's only hope is his worst enemy. 10x6 30 Oct 2011 By the Book In a deserted mansion, the CSIs find a body hanging that appears to have been killed by a vampire. 10x7 6 Nov 2011 Sinner Takes All A high stakes poker game is disrupted by a masked assassin, leaving one player dead and the CSIs baffled. 10x8 13 Nov 2011 Dead Ringer When Horatio finds another corpse with missing eyes, everything points to his nemesis, “The Taunter” – except he has an airtight alibi. 10x9 20 Nov 2011 A Few Dead Men The CSIs investigate when three convicted murderers are released from prison and someone starts killing them one by one. 10x10 4 Dec 2011 Long Gone Horatio is determined to find a family that completely disappeared. 10x11 11 Dec 2011 Crowned The CSIs expose the seedy underbelly of children’s beauty pageants when a contestant's mom is murdered. 10x12 8 Jan 2012 Friendly Fire An eccentric genius is assassinated with the most unique weapon the CSIs have ever seen. 10x13 29 Jan 2012 Terminal Velocity When a skydiver is murdered, the CSIs discover that he has more than 100 children and all of them are suspects. 10x14 19 Feb 2012 Last Straw When the sisters of a Miami sorority are knocked off one by one, the CSIs try to end the murder spree. 10x15 4 Mar 2012 No Good Deed When a neighborhood do-gooder is murdered, Horatio and the CSIs discover that he was planning to blow the whistle on something big. 10x16 11 Mar 2012 Rest in Pieces When the Miami Taunter strikes again, Horatio meets with the matriarch of the suspected killer's family. 10x17 18 Mar 2012 At Risk When a beloved tennis coach is nearly killed, Calleigh discovers a personal connection to the case. 10x18 25 Mar 2012 Law & Disorder A corruption scandal is uncovered by the CSI team which forces Horatio to face an old adversary. Malcolm McDowell returns as Darren Vogel. 10x19 8 Apr 2012 Habeas Corpse Every member of CSI is a suspect when one of the team's enemies is murdered. When the investigation becomes deadly, Samantha Owens ends up having to be rescued.