NCIS: Los Angeles‘ G. Callen and Sam Hanna (played by Chris O’Donnell and LL Cool J) will say “aloha” to Hawaii Five-0 — and then Steve McGarrett and Danny Williams (Alex O’Loughlin and Scott Caan) will return the favor — as part of a two-night crossover event for the CBS dramas, slated for May sweeps.
Read the whole spoiler on tvline.com.
