The fifth season of CSI: Miami premiered on CBS on September 18, 2006, and ended May 14, 2007.

With Caine and Delko in Brazil, it's up to Duquesne to maintain the department following Natalia's transfer to the MDPD.

All of this just in time for them to investigate not only external crimes committed against the general public but also internal issues.

Boa Vista is confronted by her abusive ex-husband again, while Caine and Delko seek to revenge those responsible for the death of Marisol.

Ultimately, however, it's Delko, once again, who faces the biggest challenge, as he fights for his life following a gunshot wound to the head.