WALES could have a surprise substitution to call on the next time they play at the Millennium Stadium...Doctor Who!
The Timelord is being lined up to land his Tardis inside Wales' sporting mecca - and use the same changing rooms as our football and rugby teams.
The Doctor has battled baddies all over Wales but the threat of new foes comes with every episode. So BBC Wales producers were at the stadium in Cardiff this week, checking it out for future inter-galactic battles.
"There were members of the production team taking pictures and having a look around," said an onlooker. "They were hoping to film at the stadium when there was a game on, they decided it was too much hassle and now they're just looking at using it. They wanted the Doctor to be running up and down stairs and filming in the BBC commentary box.
"They were wandering around the building, and even went into the away changing rooms to take pictures."
The Millennium Stadium is no stranger to running battles - although usually they're between mortals of the sporting kind, such as the FA Cup final, World Cup qualifiers and rugby internationals. And it's a home of entertainment too, having staged huge concerts including U2, Oasis and REM.
Tunnels in the venue have been used in previous episodes but this time the Doctor is likely to appear in more recognisable parts, making the stadium the latest in a long line of Welsh landmarks on Swansea scriptwriter Russell T Davies' smash hit revival of the telly favourite.
But last night the BBC were remaining typically tightlipped about the Doctor's future exploits.
"We used the stadium in series one when we shot in the tunnels. This week the crew were out looking at locations to use. They aren't saying what part of the stadium they were having a look at or why," a spokesman said.
Doctor Who first returned to our screens last March, with Christopher Eccleston as the popular Time Lord. The first episode featured dummies coming alive in Howells department store in Cardiff.
Last week drinkers at The Gatekeeper pub in the city centre were given a shock when they looked out the windows to see a troop of Cybermen marching up the street as filming took place with the new Doc and his sidekick Rose, played by Billie Piper.
The Doctor's evergreen popularity is evident from the number of people who have flocked to an exhibition all about the TV time traveller. In the first eight days of the free exhibition at Cardiff Bay's Red Dragon Centre, more than 30,000 visitors came through the doors.
Doctor Who Up Close will run for two months until February 26, open seven days a week from 11am to 8pm.