Tate is a fandom term that represents the Tony/Kate ship in the NCIS fandom. The two of them are special agents in the NCIS series. Their names are Anthony Dinozzo and Caitlin Todd. People used to ship them real hard back in the time of 2006. Kate and Tony unfortunately never shared a kiss on-screen, but we all sure hope that they did off-screen. Their relationship was always refered to as a sibling relationship, although, it was actually more of a love/hate relationship. Many hints were given that Tony liked Kate. Kate perhaps gave a few too, but Tony was head over heels for sure. They did presumably go on a date, in the episode "The Truth Is Out There" in season 1. Their relationship grew into a bit more romantic kind in season 2. In one episode, behind other characters, they can be seen holding hands while standing under an umbrella. In "SWAK", Kate pretends to be sick for Tony, who is actually sick, so she could stay with him for the night. That episode has perhaps proven the ship slightly canon. The producers admitted they actually wanted them together, but Sasha Alexander wanted to leave after season 2, so they had to kill off Kate in season 2's finale "Twilight". In season 9 episode 14, "Life Before His Eyes", Gibbs imagines what could have been if he saw the sniper trying to take a shot at Kate, resulting in the two eventually falling in love, getting married, and having a girl named Kelly. This ship is very funny.