logo The original title sequence for the Third Doctor's seasons introduced colour and was an extension of the "howlround" kaleidoscopic patterns used for the previous Doctors. It features red, black then green flaming hands, then shows Jon Pertwee's face followed by a series of swirling lines to represent the time vortex. As the vortex turns red it speeds up only to start reversing, and in some cases it is seen turning pink and yellow. In the Third Doctor's final season, a new title sequence was introduced using a full-body picture of Pertwee, designed by Bernard Lodge. Partially inspired by the slit-scan hyperspace sequence in Stanley Kubrick's 2001: A Space Odyssey, one portion of this sequence is the prototype for the time tunnel sequence of the Fourth Doctor's seasons. The Third Doctor's final season also introduced the diamond logo which would remain in use until 1980 and be revived in 2022.. The series logo introduced in 1970 and used for the first four seasons of Pertwee's tenure would later be used again, in modified form, as the logo for the 1996 Doctor Who TV movie. This version subsequently became the official Doctor Who logo, most notably with regards to products connected to the Eighth Doctor. With the introduction of a new official series logo in 2005, the 1996 logo continued to be used by Big Finish Productions as the logo for all pre-2005 series material including books and audio dramas, and by the BBC on DVD releases of episodes from the 1963–89 series, books and audio. Later appearances The Third Doctor appeared again in the 20th anniversary special The Five Doctors, broadcast in 1983. A stage play, Doctor Who – The Ultimate Adventure, was produced in 1989, starring Jon Pertwee (occasionally replaced by an understudy then later, until the end of the production run, by Colin Baker as the Sixth Doctor). In 1993, he played the role again for the 30th Anniversary charity special Dimensions in Time, and in the audio drama The Paradise of Death. Months before his death, he played the Doctor for the final time in the audio drama The Ghosts of N-Space. From 2015, Big Finish had produced a new series of audio drama adventures featuring the Third Doctor titled The Third Doctor Adventures, with Tim Treloar voicing the role. Other mentions Visions of the Third Doctor appear in The Brain of Morbius, Mawdryn Undead, and Resurrection