Fans around the world will be marking fifteen years since the original transmission of Rose at 7pm UK time today.
The episode was the first Doctor Who adventure for the Ninth Doctor and the first written by Russell T Davies. It was originally shown at 7pm on Saturday 26th March 2005.
The idea comes from Emily Cook of Doctor Who Magazine and follows a similar project where fans watched The Day of the Doctor last weekend.
Former show runner Russell T Davies will be live Tweeting the episode, and has written a prequel, available on the BBC Doctor Who Website. A sequel will be revealed at 7.45pm.
Viewers in the UK can watch on : #TripOfALifetime
Doctor Who rewatch- Rose introduction, 2020