This isn't the first time the Doctor has unraveled the Web of Time for the sake of a companion's life. He should know better, but he can't help himself. His recklessness opens the door to the forgotten ghosts of the Time War. (post-Hell Bent)

Third in the Hitting the Road series, sequel to "Partners in Time." In Victorian London, Bo, Kenzi and the Doctor help a pair of time-lost partners (in more ways than one) in a unique bind. Secondary crossover with Rizzoli & Isles

Second in the "Hitting the Road" series. Bo and Kenzi's first trip on the TARDIS leads to a planet where the Doctor meets an old friend who's in trouble from an old foe.