Hawaii Five-0 is gathering all of Steve McGarrett's allies to launch a rescue mission.

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The murder or Reyes will come back to haunt Danny and Chin in episode 18, and Five-0 will have to find a way to save Williams from a Mexican prison. Considering the ominous goodbye message the detective sends to his daughter, it looks like Danno will be in dire straights.

"As you KNOW, Chin AND Danny are in deep trouble in #H50 518... and it takes EVERYONE... and I mean EVERYONE to help them out," executive producer Peter Lenkov teased on Friday.

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Reinforcements will include Joe White (Terry O'Quinn) and Frank Bama (Jimmy Buffett), although Five-0 will need more help than the pilot and the former Navy SEAL can give.

"They need more than just Bama," Lenkov tweeted. "[and] more than White."

Who do you think will help save the day? Sound off in the comments below!

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.

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Hawaii Five-O, Television, CBS