After several bouts of hiatus, crime procedural TV show "NCIS" is on season 15 and is back to regular programming. The current storyline spoilers suggests that protagonist Leroy Jethro Gibbs (played by Mark Harmon) will have to work with a criminal— that is, to catch another criminal.

Special Agent Gibbs' former buddy Paul Triff (played by French Stewart) will appear in the upcoming episode. Triff is a man put behind bars for cutting up the bodies of three known criminals using an electric carving knife.

Gibbs used to live with Triff until the time that the latter started serving consecutive life sentences at the Maryland Correctional Facility.

However, it seems that despite this, Gibbs still desperately needs Triff's help in catching another, presumably worse, villain: Gabriel Hicks (played by Graham Hamilton).

Now Triff is back and upon his return to Gibbs' apartment, he comes to terms with the rest of the NCIS team. This sequence of events will then lead to the unlikely team-up of convicted criminal and the special branch of law enforcement.

Actors Stewart and Hamilton are not the only guests to expect in future NCIS episodes. There is also one returning star in the name of Drew Carey.

Carey, popular for being the host of the game show "The Price is Right," will reprise the role of Marine Sergeant John Ross in "NCIS." Carey has been a guest on the show before, and the warm welcome of the "NCIS" crew only served to garner Carey's praise for the people who work on the show.

"Working on NCIS was a terrific experience for me," Carey said in an interview with Entertainment Weekly. "The entire cast and crew were so welcoming and professional. You can't believe how hard they work to do that show."

"NCIS" season 15 continues on CBS. The next episode s expected to air on Feb. 27, 2018.