Life Alan Alda loves this video of him tap-dancing with his granddaughter. Now, so do we! August 26, 2019 Sonja Haller, USA TODAY Comments Off on Alan Alda loves this video of him tap-dancing with his granddaughter. Now, so do we! The "M*A*S*H" star shared a favorite throwback video that he said was "way-under-rehearsed," but it's still adorable.