Hawaii Five-0 will get a visit from Timothy V. Murphy during "Ka No'eau," and Gabriel Waincroft will make life a little more difficult for Danny and Chin.

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Murphy will take on the role Nick Mercer/Valentine in the Oct. 17 episode, and he will play a part in the case of the week. Waincroft's (Christopher Sean) secret stash of money, meanwhile, may become integral to freeing Danno's (Scott Caan) little brother from his captors.

After a Detroit hit man is offed by his colleagues in broad daylight (see photos here), Five-0 will be tasked with finding the brazen killers. When they do, however, finally come across their prime suspect (possibly Murphy), the killer will have some surprising motives.

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Meanwhile, Danny will turn to Chin (Daniel Dae Kim) for help tracking down the $18 million demanded by Marco Reyes (Anthony Ruivivar). As it so happens, Chin knows a man who has quite a bit of money, but getting to it could ruin his career.

Find out more when Hawaii Five-0 airs Fridays at 9 p.m. ET on CBS. Click the video below to see a preview for the series' next episode.


Tags: Hawaii Five-O television CBS