The Doobie Brothers’ iconic TV appearance came as they approached the height of their fame, but it wasn’t on a music show.

Most everyone thought the taping was over. Colbert said no. There was one more act of the show, and nobody was to release the audience. McKenna had the rundown in his hand. Everything on it had been ...

For most of broadcast history, captioning was treated as a metadata problem. QC systems checked whether caption data was ...