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"The Secret Circle star Shelley Hennig has promised &amp;quot;more peril&amp;quot; in the season finale. Her character Diana will team up with half-sister Cassie (Britt Robertson) and father John Blackwell (Joe Lando), the actress told TV Guide. &amp;quot;With that comes a spell that they have to do using their dark magic,&amp;quot; she explained. &amp;quot;It&amp;#039;s just a really cool spell that causes even more peril.&amp;quot; Hennig also hinted that Cassie could be corrupted by the dangerous Blackwell in the first season&amp;#039;s final episodes. &amp;quot;Diana is completely on edge,&amp;quot; she revealed. &amp;quot;It looks like Cassie&amp;#039;s falling back into thinking John Blackwell&amp;#039;s the good guy. &amp;quot;Maybe it&amp;#039;s the power taking her over, but then you realise it&amp;#039;s all about survival for Cassie and Diana.&amp;quot; The season finale - titled &amp;#039;Family&amp;#039; - will air on May 10 on The CW. The Secret Circle continues on Thursdays at 9/8c on The CW in the US and on Wednesdays at 8pm on Sky Living in the UK. &amp;gt; John de Lancie to guest star in The Secret Circle Watch a clip from tonight&amp;#039;s Secret Circle below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/the-secret-circle/news/a378539/secret-circle-star-promises-dark-magic-peril-in-season-finale/>