No one puts a member of the Hawaii Five-0 ohana in danger and gets away with it. They certainly don't send Grover and family on the run without expecting serious repercussions.

Grover's (Chi McBride) Chicago past will come back to haunt him in "Malama ka Po'e (Care For One's People)," and an old case will have Lou looking for a safe haven when a Windy city mobster makes his way to paradise.

"A case from 15 years ago forces Grover to take his family on the run when a dangerous mob boss tracks him down to seek revenge," CBS teased of the April 8 episode.

This isn't the first time the cop's Chi-town history has threatened to rip a whole in his happy life. Grover's cop buddy Clay Maxwell upset the status quo when he offed his wife on the steep hiking trails of Oahu, and McBride's keen sense of justice sent him all the back to the shores of Lake Michigan earlier this season. While he couldn't pin the murder on Clay, he could prove that his former friend did have his hand in the cookie jar.

While that trip down memory lane worked out in Grover's favor, it sounds like "Malama ka Po'e (Care For One's People)" won't resolve without a little Five-0 intervention.

It will be some time before the mob hits the sun and surf, however. March Madness has invaded CBS, and Hawaii Five-0 will find itself without a home for the next two weeks. McGarrett (Alex O'Loughlin) and Co. will return on April 1 with "Kanaka Hahai (The Hunter).

"When a man is found left for dead drifting off the coast of Oahu, Five-0 uncovers a deadly slave trade operating aboard an illegal fishing vessel," CBS teased. "Also, while Danny (Scott Caan) is out with his children, his car is stolen so he commandeers a bus to chase down the thieves."

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' latest episode.

Tags: Hawaii Five-O television CBS