The characters of NCIS: Los Angeles may have battled crime by car, in planes, and on boats, but the investigative team still has one more major mode of transportation to conquer.

Episode 5 will reportedly take Callen (Chris O'Donnell) and his crew into the realm of trains, according to a recent tweet by executive producer John Peter Kousakis.

"You'll see planes in E.502...automobiles in E.503...you won't believe what we're bringing you in E.505 [train icon]! #ipromiseideliver #NCISLA #October," Kousakis told followers earlier this week.

The NCIS: LA Team Hit The Raceway For Season 5's "Omni" 

On Monday, Kousakis revealed the locomotive-themed title - "The Livelong Day" - for the upcoming episode along with a photo of the script cover.

"Trains! E505 concept [meeting]. Dennis Smith on the house. #NCISLA," the executive producer tweeted to fans.

With consulting producer Joe Sachs penning the episode and seven-time NCIS: LA director Dennis Smith at the helm, fans should expect a solid episode for "The Livelong Day." While Sachs has also scripted season 3's "Higher Power" and "The dragon and the Fairy" along with season 4's "Drive" and "Purity," Smith has directed over 50 episodes of the drama's parent show, NCIS.

View Behind the Scenes Photos From the NCIS: LA 100th Episode Celebration

Currently the NCIS: LA crew is bussy filming the 100 th episode, "Reznikov, M," but they should be ready to shoot episode 5 shortly after Labor Day. While Kousakis and Smith engaged in preproduction scouting, the EP posted a photo of the train used in 2010's Unstoppable.

NCIS: LA will return to CBS on Sept. 24.

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