Things are getting more and more exciting in the popular American action police procedural television series. As a matter of fact, in the upcoming NCIS Season 16 Episode 20, special agent Jethro Leroy Gibbs (Mark Harmon) would be linked into a mystery crime that occurred around the time of September 11. Now, avid followers are wondering: is Harmon's character a murderer?

NCIS Season 16 Episode 20 spoilers suggested that special agent Leroy Jethro Gibbs would be put in a tight spot after his blood was found on a retrieved corpse. Agents Timothy McGee (Sean Murray), Donald Mallard (David McCallum), Nicholas Torres (Wilmer Valderrama) and Eleanor Bishop (Emily Wickersham) would realize how crucial the situation is for Gibbs and for the rest of them. Being the fearless team leader, Gibbs' associate would, then, try their best to make sure that he would get past through this challenging moment.

To make the investigation looks as impartial as possible, Tim McGee advised special agent Leroy Jethro Gibbs to go home as they look into the case in NCIS Season 16 Episode 20. The entire team does not want to get an unsatisfactory result for this investigation and put back the blame to the involvement of Mark Harmon's character with the case. They, also, want to avoid allegations of coverups and other baseless speculations.

If special agent Leroy Jethro Gibbs decides to go home in NCIS Season 16 Episode 20, it would be a perfect time for him to reflect on what Ellie Bishop, previously, told him. It can be recalled that Ellie has been exploring for some details to know whether or not former NCIS member Ziva David (Cote de Pablo) is still alive. It remains to be seen if Ellie's investigation would lead to Ziva's return in the popular television series.

Rumors are, also, rife that the forthcoming NCIS Season 16 Episode 20 could be Mark Harmon's official exit from the show since he has another series in the works called Prey. However, the 67-year-old American actor has not announced anything as of yet. Hence, avid followers of the show should take these unverified claims lightly until everything is proven true and correct.

Before NCIS Season 16 Episode 20, speculations about the possibility of Ziva David being alive after Ellie found a note inside the former's secret office in the suburbs. Ellie, then, told special agent Leroy Jethro Gibbs about her discovery. However, the character of Mark Harmon snapped the journal from Ellie after their heated exchange.

Now, the question is: did Ziva wrote the letter herself and read it to the kidnapper? Well, that is something fans should find out in the imminent new episode. CBS is set to air the "Hail and Farewell" episode on Tuesday, April 16. Stay tuned to Business Times for the latest NCIS Season 15 Episode 20 spoilers, predictions, news, and updates.