On the 250th episode of NCIS, Anthony Sr. makes another memorable appearance.

According to the official synopsis, "Someone winds up dead when DiNozzo confronts a man impersonating a Navy officer; DiNozzo's father has a secret."

That last part is sure to come as the ultimate surprise to longtime fans of the show.

Watch the CBS teaser below for your first look at the upcoming "Dressed to Kill":

Last night's NCIS Season 11 Episode 15 centered around a gun show owner who pulled double duty as a contractor for the recycling of faulty body armor.

It also featured Bishop in "probie" capacity. With Parsa out of the way, she was the low woman on the totem pole, much to Tony and McGee's delight.

And the satisfaction of more than a few discerning fans as well, to be sure.

For another look at this week's installment of TV's #1 show, "Bulletproof" as well as previous weeks, you can watch NCIS online right here at TV Fanatic.

Scroll through a photo gallery from NCIS Season 11 Episode 16 below: