Linda Hunt stars as Hetty Lange on NCIS: Los Angeles.
She's in charge of the technology that Henna and Callen use on the show. She's pretty much like the Q to their James Bond.
Callen: Is there a military angle to any of this?
Hetty: No, but Detective Deeks is still the Liaison Officer with the LAPD, which makes him about as close to one of us as it gets.
(Hetty approaches Callen as he is sleeping, he wakes up staring at Hetty)
Hetty: Did you catch him this time? You were twitching like a sleeping dog.
Callen: Well, you now what they say about sleeping dogs. (looks at Hetty)