John Leeson would do the Times crossword puzzle from his headset with Tom Baker during down time on set. He thought they were just keeping busy between takes. Since he was voicing from far off, he didn’t realize there were a ton of locals watching the filming! But for all of the fans watching, it appeared as though The Doctor was completing the daily crossword with K-9.

“Many times I’ve sat with a camera and another actor and seen all their fears and insecurities and struggles. You want to support them and help them as much as you can.”
Christopher Eccleston
(via kensiiblyes)