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" Jenna-Louise Coleman has described her Doctor Who arc as &amp;quot;mystifying but exciting&amp;quot;. The actress told Metro that getting to grips with her multiple roles on the BBC sci-fi drama had been a challenge.  &amp;quot;It&amp;#039;s a hard backstory to get your head around,&amp;quot; admitted the star - who played Oswin in 2012&amp;#039;s &amp;#039;Asylum of the Daleks&amp;#039;, before returning as a Victorian governess in Christmas special &amp;#039;The Snowmen&amp;#039; and 21st-century girl Clara in this Saturday&amp;#039;s &amp;#039;The Bells of Saint John&amp;#039;. &amp;quot;My approach was to play all three as individual people and trust that there would be a payoff. It was mystifying but exciting to get the chance to play such a complex part. You never know where it&amp;#039;s going to lead.&amp;quot; Coleman also claimed that &amp;quot;the energy&amp;quot; required to work on Doctor Who is &amp;quot;ridiculous&amp;quot;. Photo gallery - Doctor Who series 7B pictures: &amp;quot;The difficulty is you&amp;#039;re consistently running,&amp;quot; she explained. &amp;quot;This isn&amp;#039;t like any other show - I&amp;#039;ve never sat down and had a conversation in any episode. &amp;quot;You&amp;#039;re talking and moving all the time. The energy you need is ridiculous. I think it&amp;#039;s all about finding the tune - at first all I could see were all the individual notes.&amp;quot; Doctor Who returns to BBC One this Saturday (March 30) at 6.15pm. &amp;amp;gt; Doctor Who Jenna-Louise Coleman teases Clara, Doctor &amp;quot;flirtation&amp;quot;&amp;amp;gt; Doctor Who producer on Clara twist: &amp;quot;I defy anybody to guess it&amp;quot; Watch the stars of Doctor Who talk &amp;#039;The Bells of Saint John&amp;#039; with Digital Spy below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/doctor-who/news/a469162/doctor-who-plot-is-mystifying-exciting-says-jenna-louise-coleman/>