"Scream of the Shalka" was originally released as 6x15 minute Flash animation webisodes by the BBC to commemorate the 40th anniversary of the program when there was no Doctor Who program currently on-air in 2003. Shortly afterward, BBC One had decided to bring Doctor Who back to the tele and then-showrunner Russell T. Davies in an interview with Doctor Who Magazine announced that the new television Doctor (played by Christopher Eccleston) would be the Ninth Doctor, relegating Richard E. Grant's Ninth Doctor to an alternate Whoniverse. Davies later commented that Grant had never even been considered for the role in the new series, quoted as saying in DWM: "I thought he was terrible. I thought he took the money and ran, to be honest. It was a lazy performance. He was never on our list to play the Doctor. Therefore it exists outside of the continuity canon of the Whoniverse." A bit harsh I'd say.
I've enjoyed other animated adventures of Doctor Who including Cosgrove Hall's wonderful work on the 10th Doctor serial Doctor Who: The Infinite Quest and the wonderfully animated reconstruction episodes on Doctor Who: The Invasion (Story 46), and recently Quarios' work animating the 2 missing episodes from Doctor Who: The Ice Warriors (Story 39). I think the animation in "Scream of the Shalka" is equally as good and interesting and enjoyable to watch with good performances by Richard E. Grant as the Doctor (Who appeared, ironically, as the Tenth Doctor in the parody "The Curse of Fatal Death" and as the villain in Doctor Who: The Snowmen [Blu-ray] (2012) and Derek Jacobi as the Master (who would later reprise his role in "Utopia") and the Doctor's companion, Alison Cheney, voiced by Sophie Okonedo who also appeared as Liz 10 in "The Beast Below" and "The Pandorica Opens." David Tennant even has a cameo. There's no denying the significance that "Scream of the Shalka" contributed to Doctor Who's long-awaited return to the airwaves and it's a fascinating look at an attempt to give the fans new material in another media format during a period when we only had the Big Finish audio dramas to keep the show going after Paul McGann's singular appearance as the Eighth Doctor in the Americanized Doctor Who: The Movie (Special Edition).
Extras include "Carry On Screaming" where the production team discuss the genesis of the animated series, "Screaming Sessions" with the cast and crew minus Richard E Grant discuss being turned into animated characters, "Interweb Of Fear" talks about the BBC's plans to bring online media with Doctor Who to the forefront, and finally "The Soundtrack Album" features over 27 minutes of isolated music score. Still, there's no reason why these could not have been included as bonus material on another 2-disc DVD set (this is NOT a 2-disc set, btw, even though there is a misprint on the packaging), perhaps as part of the Doctor Who 50th Anniversary Special: The Day of the Doctor (Blu-ray 3D / Blu-ray / DVD Combo) along with the docudrama "Doctor Who: An Adventure In Space and Time" or even as part of the "Doctors Revisited" series Doctor Who: Doctors Revisited - Ninth to Eleventh. If you are a completist, or you REALLY liked "Scream of the Shalka," then it's probably worth justifying purchasing the DVD. I strongly encourage anyone who hasn't seen it though to watch the webcasts online for free first (http://www.bbc.co.uk/doctorwho/classic/webcasts/shalka/) to decide for yourselves if it is worth splurging on to add it to your collection.