A Dalek was out and about on Monday - but what brought this one to London?
And why were so many people willing to get into a big queue?
Here's why? It's Doctor Who stars David Tennant and Freema Agyeman!
They were at a shop in London to sign copies of the third series of the show on DVD for 300 lucky Doctor Who fans.
There weren't just lots of fans there though - photographers were there too to get loads of snaps of the pair.
Which seemed to surprise the actors. Especially Freema, who seemed really shocked that so many people were there.
They posed for quite a long time, with David in particular having fun playing around with the photographers.
But after a few more snaps it was time to move on, leaving Freema a little confused about what they had to do next...
It was down to business and time to sign 300 DVD box sets. And without a Tardis to help it was going to take a while.
Especially with this many fans still waiting in line to meet the pair!