William Petersen as Gil Grissom on CSI.   (Photo: Courtesy of CBS)

9. Gil Grissom and Sara Sidle on ‘CSI’
Last spring, in the last minute of the last episode of the season, Grissom (William Petersen) looked up from his bedtime reading at Sara (Jorja Fox) in the bathroom door, fresh from a shower. All this reticent fall, they haven’t touched and barely smiled, but their intimacy has a resounding vibe. Runner-up: What’s going on behind the eyes of Brennan (Emily Deschanel) and Booth (David Boreanaz) on Bones? No wonder lab boss Saroyan (Tamara Taylor) is jealous, though she’s the one sleeping with Booth. The lesson of both couples: Don’t ask, don’t tell, don’t show.