The David Tennant Treat 4 Today is part of a panel from the Dallas Fan Expo 2017 where Catherine Tate spoke about how it was “a joy to work with David Tennant” both on Doctor Who and Much Ado About Nothing.
One quote is "Doctor Who was pivotal for me because without that show I wouldn’t know David.
And David is a fixture in my life which is an amazing thing. So I’m very very grateful to be part of the Whoniverse."
Link to the full interview.