Hawaii Five-0 - Season 10 Episode 12
Ihea 'oe i ka wa a ka ua e loku ana (Where Were You When the Rain Was Pouring?) (I)

When a list of undercover CIA agents is stolen, Steve and Five-0 enlist the help of Magnum, Higgins, Rick and TC to get it back and protect national security. Also, Higgins gives Tani some personal advice. The crossover continues on Magnum P.I. S02E12 Desperate Measures (II).