This csi screencap might contain
traje de negocios, juego de negocio, retrato, tiro en la cabeza, primer, headshot, primer plano, en la cabeza, and closeup.
Jack picks up on the vibes between Sara and Grissom. We learn the name of their dog is Hank, not Bruno (his actual name). A reference to Sara's ex, perhaps, o just coincidence?