NCIS: Los Angeles (2009)

S03E21 Touch of Death (II)

The combined NCIS: Los Angeles and Hawaii Five-0 task force heads from Hawaii to Los Angeles after the prime suspect in their investigation relocates to the mainland, bringing a lethal virus with him. This thrilling crossover kicks off in Hawaii Five-0 Season 2, Episode 21, titled "Pa Make Loa" (Touch of Death).