Tags: NCIS Season 13 Spoilers

'Murder the First' alum Taye Diggs has been cast as Marine Gunnery Sergeant Aaron Davis in 'NCIS' Season 13 and Laura San Giacomo returns to reprise role as Doctor Grace Confalone. Also, CBS has released the official plot for the 300th episode.

‘NCIS’ Season 13 Episode 17 will see Dinozzo on a date. But things might not go as expected. 'NCIS' season 13 soon marks the show's 300th episode.

Taye Diggs has been cast for 'NCIS' Season 13 as a sniper who serves as a witness to the Iraq ambush murder case while Special Agent DiNozzo pays his ex-girlfriend Jeanne an all-nighter visit. Plus, CBS finally released the synopsis for episode 16.