In Deja Q, Riker tells Worf to contact all ships in the sector and have them rendezvous and join in relief efforts. We can see Worf responding to Riker in the background but we cannot hear the dialogue. Its not there !
Just checked the DVD and this was a mistake in the original run! Well done for being so authentic, CBS-D
Why did I not notice this until the HD version?
Hmm. I'll need to check it, but is it possible it was always intended to be that way? I don't remember the shot, but sometimes you don't need to hear dialogue. Hitchcock famously did this numerous times.