'Doctor Who': David Tennant, Matt Smith photo from 50th anniversary read through

doctor-who-david-tennant-matt-smith-50th-anniversary-bbc.jpg "Doctor Who" fans, get ready for timelines to collide: David Tennant and Matt Smith just finished their first read through for the sci-fi staple's upcoming 50th anniversary special.

The official BBC "Doctor Who" Twitter account blasted the above photo of the pair following the read through. We certainly hope it was a success.

While storyline details for the 50th anniversary special are being kept under wraps, it was recently confirmed that Tennant would return for the episode. Is it possible we'll see Doctors Ten (Tennant) and Eleven (Smith) share the screen? And what role will another returning favorite -- Billie Piper as companion Rose Tyler -- play in the adventure?

We know current companion Clara ( Jenna-Louise Coleman) will be involved, and by the time the special arrives on Nov. 23, we should have an explanation for her mysterious ability to appear at various points throughout time.

"Doctor Who" is currently airing on BBC America in the U.S.
Photo/Video credit: BBC