Jigsaw

Instead of sleep, Jack Harkness indulged in onanism and jigsaws. (AUDIO: Hostile Environment)

The cathedral gift shop stocked jigsaws. (PROSE: Iris Wildthyme and the Unholy Ghost)

Invalid stories
Dalek jigsaws were sold as part of the Daleks' merchandising efforts in the 1960s. (NOTVALID: Doctor Who? 83)