At the start of March 2018 David Tennant attended Emerald City Comic Con fan convention in Seattle in the US for two and a half days there. Billie Piper also joined David Tennant and they had individual autograph and photo sessions plus a combined Question And Answer panel and dual photo ops.
This is a page of the best (i.e. most unusual) photos of David on Friday 2nd March.
Apologies that we cannot credit the people in the photos.
Emerald City Comic Con section of DavidTennantOnTwitter.com