CBS has scheduled a fun crossover event for May.

As first reported by TV Guide, look for a spring episode of Hawaii Five-0 to feature special appearances by Chris O'Donnell and LL Cool J of NCIS: Los Angeles, as their agents Cullen and Hanna fly over to help with the outbreak of a deadly virus.

In October, Daniela Ruah's Kensi Blye also made an appearance on the island opposite McGarrett and Joe. Why repeat the gimmick?

"It was great fun earlier this season to see Danni soaking up the sun on Hawaii Five-0, so when CBS asked if we were interested in doing a double episode crossover, we jumped at the idea," says Shane Brennan, the creator of the NCIS franchise. "What we've come up with is an enormously entertaining, high octane story that showcases the very best of both shows. It's going to be a fun ride."

Hawaii Five-0 producer Peter Lenkov agrees, adding he's curious to explore "the relationship between McGarrett and Hanna, both SEALs with a little history."