Twilight (NCIS)

The episode is written by John Kelley and directed by Thomas J. Wright, and was seen by 14.74 million viewers.

In the meantime, they also try to find out who killed two off-duty sailors whose deaths might be linked to an upcoming terrorist attack and the theft of a drone from a company.

But in the end, it might not be enough as NCIS find themselves paying a very high price for their efforts when one of their own is brutally murdered in Gibbs and Ari's battle with each other...

While collecting evidence, DiNozzo discovers a bomb under the car, which explodes close to the team, making Gibbs believe someone is after them.

The investigation continues, leading to the discovery of a missing target drone from the workplace of one of the dead pilots.

DiNozzo tells Todd that she did good, pleasantly surprising her, and she says, "Wow, I thought I'd die before I ever heard a complim–", when a lone bullet suddenly emerges from out of nowhere and rips through her head, killing her instantly.

DiNozzo's face is covered in a splash of Kate's blood, and Gibbs points his gun into the distance, knowing Ari was the shooter.

Executive producer Donald P. Bellisario got the message about Sasha Alexander wanting to leave the show when he was writing the episode "SWAK".

Sasha came in two days before I was to leave, and with tears in her eyes, she said, 'I just can't work this hard.

Brian Dietzen as Medical Assistant Jimmy Palmer, Joe Spano as Senior FBI Agent Tobias Fornell, Alan Dale as NCIS Director Thomas Morrow, and Rudolf Martin as rogue agent Ari Haswari.

[1] The loss of agent Todd was received as a shock by fans, and series creator Bellisario had to point out it was Alexander's own choice to leave the show.

The reruns in the summer also got high numbers of viewers, which the producers explained to be because of the press cover in the aftermath of agent Todd's death.

Gibbs and his team of Tony DiNozzo, Kate Todd and Timothy McGee were all in a building taking enemy fire, while at the same time trying to stop a missile from blowing up a ship.