Fresh Air with Terry Gross

This interview was originally broadcast on May 9, 2011. In The Garden Of Beasts is now available in paperback.

Two spheres merge in The Avengers: the Marvel Comics universe and the Whedonverse, fans' name for the nerdy wisecracking existentialist superhero world of writer-director Joss Whedon.

The Whedon cult is smaller but maybe more fervent, inspiring academic conferences on such subjects as free will vs. determinism in Buffy the Vampire Slayer. I find a lot of Whedon's banter self-consciously smart-alecky, but I love how he can spoof his subjects without robbing them of stature.

TV writer and producer Steven Moffat specializes in injecting new life into old, familiar characters and stories. He first worked his magic on the revived edition of Doctor Who, leading to several BAFTA and Hugo Awards for the series.

More recently, he has turned his eye to the world's greatest detective, Sherlock Holmes. As the co-creator of the critically acclaimed BBC series Sherlock, Moffat is responsible for updating Sir Arthur Conan Doyle's famous fictional creation for a modern-day audience.

Julia Louis-Dreyfus will forever be known to millions as Elaine Benes, the character she played for nine seasons on Seinfeld. But she was also an early cast member of Saturday Night Live, and she won the Emmy for Best Comedy Actress while starring in the CBS series The New Adventures of Old Christine, which ran for five seasons after Seinfeld.