twelve episodes each; the fifth series was truncated with only six episodes having been produced before Sladen's death in 2011, as a result of which the programme was cancelled. Sarah Jane's Alien Files, a spin-off of The Sarah Jane Adventures, aired along with the fourth series in 2010. A second animated serial, Dreamland, aired on CBBC in Autumn 2009. David Tennant voiced the Tenth Doctor, and the serial also starred Georgia Tennant (who appeared in Doctor Who 2008 series as the Doctor's daughter, Jenny). On 24 April 2006 The Independent, the Daily Star and The Times confirmed, following past rumours, that K-9 would be featured in a 26-part computer-animated children's series, K-9, to be written by Bob Baker. The article in The Times also featured a picture of the redesigned K-9 for the animated series. Each episode will be 30 minutes long, made by Jetix Europe and London-based distribution unit Park Entertainment. According to a report in Broadcast magazine, the BBC opted out of involvement in order to focus on Torchwood, meaning that BBC-owned characters are unlikely to appear in the series. K-9 was first premiered on 31 October 2009. The 26th and final episode was aired on 25 September 2010. On 1 October 2015 the BBC announced a new spin-off titled, Class, which is set in Coal Hill School. It premièred on BBC Three on 22 October 2016. The eight-episode series is written by Patrick Ness. In March 2016, it was announced that Greg Austin would be cast as Charlie. On 7 September 2017, BBC Three controller Damian Kavanagh confirmed that the series had been cancelled. A new animated series called Daleks!, which consists of five 10-minute long episodes, was released on the official Doctor Who YouTube channel in 2020. Future television spin-offs On the 27th January 2023, Russell T Davies confirmed (via GQ) that future Doctor Who spin-offs were in the works. It is currently unknown what form these spin-offs will take. Charity Doctor Who also appeared on television in the form of special one-off productions to benefit charity. In 1993, Dimensions in Time was produced for the benefit of Children in Need, coinciding with the series' 30th anniversary. It was a special in two parts, running about 12 minutes in total, which featured all surviving Doctors (including Tom Baker in his first appearance as the character since 1981), and more than a dozen former companions. Not meant