Guest Star: Rena Strober

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  The Fortification Implementation
  Season 8, Episode 20 - Aired April 9, 2015

  When Sheldon feels down about being left out of a physics symposium, Amy suggests they spend their date night building a fort, which leads to a new development in their relationship.

  When Penny appears on Wil Wheaton's podcast and reconsiders her decision to quit acting, she and Leonard have a huge on-air argument. Meanwhile, after Howard gets the title deed to his mother's old house, he is surprised when an unknown relative turns up on the doorstep.

  Appeared as Caller, V.O.