When the team is investigating the murder of a probation officer and a hostage situation, Horatio learns that the main suspect could be his son.

Horatio's son goes missing when a prison transport is attacked. Upon learning the identity of Kyle, he is targeted in order to get at Lt. Caine, who must find him before it is too late.

Meanwhile, Ryan causes tension with his former colleagues when he is hired as an expert witness for the defense.

The investigation into a runway model's death leads Horatio to his son and his nemesis.

Kyle's mom shows up in Miami and she is the widowed wife of a billionaire. She wants Kyle back and will do anything to get him back.

In the second part of the two part episodes, Horatio deals with his past and the rest of the team works to rescue Calleigh from kidnappers.

As the first new medical examiner they have is shot, the CSIs learn the streets of Miami got more dangerous. Horatio must keep his team alive and restore order to his son's life. The clock runs out when one of their own is gunned down.

The evidence on who shot Horatio leads the team to some of most Miami's dangerous including one of their own.

The CSIs make a shocking discovery about their murder victim, while Horatio tries to save his son from Julia's erratic behavior.

When a flight attendant is murdered, the CSIs uncover all the dirty secrets of airplane travel.

Miami's wealthiest appear to be targeted in a series of stabbings and robberies, and evidence leads back to Russian mobster Ivan Sarnoff, who was last seen in prison, mocking Horatio.

An explosion in an upscale Miami eatery has the CSI team scrambling to figure out who would target a family enjoying a dinner out, and why...

The CSIs investigate the case of a man boiled alive, Julia spirals out of control, and one of the team's darkest secrets comes to light.

When doubt is cast on his murder conviction, a man receives a 24 hour stay of execution very little time for Horatio and the team to reaffirm his guilt or establish his innocence.

One of Kyle's army friends tries to protect his girlfriend from an "honor killing" and winds up as the number-one suspect in a murder...