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"The first images of Stephen Hawking&amp;#039;s guest appearance on The Big Bang Theory have been released.  In the pictures, the 70-year-old theoretical physicist can be seen meeting with Sheldon (Jim Parsons) in what appears to be a library.   They are taken from an episode of the CBS sitcom airing in the US this Thursday (April 5) entitled &amp;#039;The Hawking Excitation&amp;#039;, which follows Sheldon&amp;#039;s attempts to track down the cosmologist after Wolowitz (Simon Helberg) begins working with him.  Details of Hawking&amp;#039;s cameo in The Big Bang Theory first emerged last month.   Last week&amp;#039;s episode featured a guest appearance from Leonard Nimoy, who provided the voice for an action figure of his Star Trek character Spock.  The Big Bang Theory airs at 8/7c on CBS.  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/the-big-bang-theory/news/a374649/the-big-bang-theory-stephen-hawking-meets-sheldon-first-pictures/>