David Tennant and Billie Piper saying they love each other WW Comicon - Philly - May 9, 2015

This is as close as David Tennant and Billie Piper came to telling their characters they love each other. This was their hesitant response at Wizard World Comicon in Philly on May 9, 2015. They simply told each other they love each other despite being asked to finish the lines from the show.