Hawaii Five-O and NCIS: Los Angeles are gearing up for another crossover event.

On April 30, the action begins on H5O, carrying over to NCIS: LA the next night.

The next Hawaii Five-O, entitled “Pa Make Loa,” brings NCIS agents Callen (Chris O'Donnell) and Sam (LL Cool J) to Hawaii when there’s a suspect on the loose who is threatening to release a deadly virus into the population.

Then, the joint task force travels from Hawaii to Los Angeles when the lead suspect in the case moves to the mainland with the deadly virus in tow on an NCIS: Los Angeles episode entitled "Touch of Death."

Danny (Scott Caan) and Chin Ho (Daniel Dae Kim) make the trip from H5O.

Fun fact: The translation of "Pa Make Loa" is ... "Touch of Death."

Both shows are on a break until the two-part crossover event.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.