David Tennant and Catherine Tate will both tweet along with this Sunday's fan rewatch of the Doctor Who series four finale.
Former showrunner Russell T Davies will lead the screening of the epic two-parter, 'The Stolen Earth' and 'Journey's End', from 7pm on Sunday and has promised to reveal "extra surprises", including one which is "brand new and the best thing I've ever made".
The episodes saw Tennant's Doctor and companion Donna Noble (Tate) join up with former companions, including Rose, Sarah Jane, Martha and Captain Jack, in order to stop Dalek creator Davros from destroying the universe.
+++ INCOMING MESSAGE +++ INCOMING +++ Live tweets joined by DAVID TENNANT and CATHERINE TATE! Yes, you know who they are! Live on the #SubwaveNetwork on Sunday at 7pm. Detonate the Reality Bomb! pic.twitter.com/TJad59Vjs1— Russell T Davies (@russelldavies63) April 17, 2020
Legendary Who director Graeme Harper, who has worked on the show since the 1960s, will also tweet along with the episodes.