Force18 are offering readers of Doctor Who News a chance to win one of their new Doctor Who-inspired t-shirt designs.
In order to enter the competition, simply answer the following question:
Force18's new designs are inspired by two of Doctor Who's memorable icons ... but in which episode did we see a Dalek actually appear inside the TARDIS?
Closing date: Sunday 17 July. Open to residents of the UK, Ireland, USA, Canada, Australia, New Zealand and all EU Member States.
Email your answer to this competition address with the subject line "Force18 Competition" - we will contact the winners with details on how to receive their prize from Force18 after the competition has closed. Please state which t-shirt design you'd prefer to receive if you win.