The Big Bang Theory: The Alien Parasite Hypothesi

9:00pm Thursday, January 6 on E4

Amy finds she has sexual feelings for Penny’s ex-boyfriend Zack.

About the author

  • BBC One
  • BBC Two
  • BBC Three
  • ITV1
  • ITV2
  • 4
  • E4
  • Film4
  • More4
  • Five
  • Fiver
  • Sky1