This past week, Doctor Who fans were given another teaser for the upcoming 50th anniversary special “The Day of the Doctor,” airing on November 23rd, 2013. This is a moment that all “Whovians” are looking forward to, because it celebrates a great milestone in the life of the British science fiction show.

The Anniversary Tribute video (shown below) was released by the BBC on Saturday, October 19th, 2013, and was also released by various other BBC-affiliated networks, such as BBC America. The high-resolution video gives the viewer a glimpse of “The Day of the Doctor,” along with highlighting various other Doctors throughout the show’s history, starting from William Hartnell (First Doctor) through to David Tennant (Tenth Doctor), and finishing out the tribute with Matt Smith (Twelfth Doctor). The tribute also shows the different versions of the Doctor’s handy tool, the Sonic Screwdriver, that have been used throughout the show’s history.

http://www.youtube.com/watch?v=g0AX8rgJ8f0

Narrated by Matt Smith, the trailer describes why the Doctor does what he does, as well as a brief synopsis of what “The Day of the Doctor” will be about…

“I have been running all my lives through time and space. Every second of every minute of every day for over 900 years, I’ve fought for peace in a universe at war. Now, the time has come to face the choices I made in the name of the Doctor. Our future depends on one single moment of one impossible day. The day I’ve been running from all my life. The Day of the Doctor.”

This tribute to the Doctor Who 50th anniversary comes shortly after teasing stills of the show were released last week, showing Matt Smith, David Tennant, Jenna-Louise Coleman, Kate Stewart, and John Hurt.

As you can see from the image below, a “behind-the-scenes” look of the opening scene of the trailer has been released and is floating around Twitter.

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(Image source: @BlogtorWho)

Various Whovians in the Twitterverse have various reactions to the Doctor Who 50th anniversary trailer released by the BBC.

Finally watched the Doctor Who 50th anniversary trailer. Ah LADS, that was amazing. Genuine goosebumps

— Silas Shriek (@silasmeek) October 21, 2013

I appear to not be able to stop watching the Doctor Who 50th trailer/ tribute thing… I've lost count now… #SaveTheDay

— Sonal Mistry (@sontikat) October 21, 2013

#savetheday Erm… Fangirling over here people ^.^ I must've watched this trailer for about 2 hours now. Bit worrying. #DoctorWho50th

— Beth Long (@bethl66) October 21, 2013

I'm kind of emotional over the 50th anniversary trailer for doctor who right now it's so good wow

— David Tennant (@de4rmaria) October 21, 2013

I FINALLY saw the #DoctorWho50th teaser trailer and i LOVE it… BUT what the hell have you done to your hair Matt??

— Emma LeRouge (@EmmaLeRouge) October 21, 2013

When the new Doctor Who 50th trailer dropped last week, I saw fans upset that Clara was in it more prominently than some Doctors.

— Adam Riggio (@adamriggio) October 22, 2013

[Header image source: YouTube (0:36)]