London, May 15 : Former 007 Timothy Dalton is set to play a baddie in one of David Tennant's final episodes of Doctor Who.

The actor has already flown down to UK for filming.

"Timothy Dalton is a big coup for Doctor Who because he's pretty iconic," the Sun quoted an insider as saying.

"He's in the UK right now and is shooting scenes over the next few weeks.

"It's a good gig for him as it will be one of the most memorable episodes yet," the insider added.

The `Licence To Kill' star will appear in one of three specials marking the final appearance of Tennant, 38, as the Time Lord.

The last of the three will see the star regenerate into the new Doctor - played by Matt Smith, 26.

However, BBC1 has not yet decided on exactly when the three specials will be shown.

It is expected to screen around Christmas, with one possibly being shown on New Year's Eve. (ANI)