Peter O’Brien will guest star in the next instalment of Doctor Who: The Waters Of Mars.
He will feature as Ed, second in command to The Doctor’s new companion, Adelaide.
As previously reported, David Tennant is joined by his cleverest and most strong-minded companion yet, with Adelaide played by Lindsay Duncan. Adelaide is head of the Mars Base and doesn’t take kindly to an uninvited appearance by The Doctor.
The BBC has also released a new teaser for “The Waters Of Mars”, the second of four specials being screened in the UK this year.
This is the second time O’Brien has appeared in a work by Russell T. Davies, having had a role in the original Queer as Folk.