The team must hunt down a war criminal before he disappears on NCIS: Los Angeles. "Iron Curtain Rising" is the 11th episode of the show's fifth season.
(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)