Air date: 2011-09-25

Runtime: 44 min

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.

Air date: 2011-10-02

Runtime: 44 min

The discovery of a strange murder weapon leads the CSIs into the world of gigolos.

Air date: 2011-10-09

Runtime: 44 min

A tornado touches down on a murder scene, damaging the evidence and putting Ryan and Walter in grave danger.

Air date: 2011-10-16

Runtime: 44 min

Horatio and his team are hunting a sadistic psychopath who tortures women - and one of them may still be alive.

Air date: 2011-10-23

Runtime: 44 min

Mexico's deadliest assassin is a target in Miami. Horatio's only hope is his worst enemy.

Air date: 2011-10-30

Runtime: 42 min

In a deserted mansion, the CSIs find a body hanging that appears to have been killed by a vampire.

Air date: 2011-11-06

Runtime: 44 min

A high stakes poker game is disrupted by a masked assassin, leaving one player dead and the CSIs baffled.

Air date: 2011-11-13

Runtime: 43 min

When Horatio finds another corpse with missing eyes, everything points to his nemesis, “The Taunter” – except he has an airtight alibi.

Air date: 2011-11-20

Runtime: 44 min

The CSIs investigate when three convicted murderers are released from prison and someone starts killing them one by one.

Air date: 2011-12-04

Runtime: 42 min

Horatio is determined to find a family that completely disappeared.

Air date: 2011-12-11

Runtime: 44 min

The CSIs expose the seedy underbelly of children’s beauty pageants when a contestant's mom is murdered.

Air date: 2012-01-08

Runtime: 44 min

An eccentric genius is assassinated with the most unique weapon the CSIs have ever seen.

Air date: 2012-01-29

Runtime: 45 min

When a skydiver is murdered, the CSIs discover that he has more than 100 children and all of them are suspects.

Air date: 2012-02-19

Runtime: 45 min

When the sisters of a Miami sorority are knocked off one by one, the CSIs try to end the murder spree.

Air date: 2012-03-04

Runtime: 44 min

When a neighborhood do-gooder is murdered, Horatio and the CSIs discover that he was planning to blow the whistle on something big.

Air date: 2012-03-11

Runtime: 44 min

When the Miami Taunter strikes again, Horatio meets with the matriarch of the suspected killer's family.

Air date: 2012-03-18

Runtime: 45 min

When a beloved tennis coach is nearly killed, Calleigh discovers a personal connection to the case.

Air date: 2012-03-25

Runtime: 42 min

A corruption scandal is uncovered by the CSI team which forces Horatio to face an old adversary. Malcolm McDowell returns as Darren Vogel.

Air date: 2012-04-08

Runtime: 44 min

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.