Switchbackncis: Hawai'i : Season 1 Episode 21 Apr 2026

Watch the official teaser for this episode's high-stakes operation:

: The episode also explores the ongoing professional and personal tension between Lucy Tara and FBI Agent Kate Whistler following their previous relationship issues. Main & Guest Cast SwitchbackNCIS: Hawai'i : Season 1 Episode 21

: Back in Hawai'i, the NCIS team investigates the murder of a Marine that turns out to be directly connected to Milius's secret operation. Watch the official teaser for this episode's high-stakes

Ernie Malik makes a "nerdy" pop culture reference during the episode, quoting Doc Brown from Back to the Future by saying, "Faces. Where we’re going we don’t need faces," while describing an algorithm. Where we’re going we don’t need faces," while

: Captain Milius returns to Hawai'i to enlist Jane Tennant as his personal security escort for a secret prisoner exchange operation set to take place in the Philippines.

The episode features the series regulars alongside key recurring and guest stars: : Vanessa Lachey Capt. Joe Milius : Enver Gjokaj Jesse Boone : Noah Mills Lucy Tara : Yasmine Al-Bustami Ernie Malik : Jason Antoon Kate Whistler : Tori Anderson CGIS Agent Neil Pike : Mark Gessner Notable Trivia