Aired Thursday June 20, 12:00pm - 12:30pmon E4

The Big Bang Theory

Series 4 Episode 9: The Boyfriend Complexity

When Penny's dad comes to visit, Leonard discovers that she told her parents they were back together because they always had a soft spot for him. Leonard takes full advantage and plays his boyfriend role to the hilt much to Penny's dismay. Elsewhere, Raj is disappointed when Bernadette shows up during his and Howard's quality time.

Original air date
Cast and crew
  • Mark CendrowskiDirector
  • Johnny GaleckiLeonard Hofstadter
  • Jim ParsonsSheldon Cooper
  • Kaley CuocoPenny
  • Simon HelbergHoward Wolowitz
  • Kunal NayyarRaj Koothrappali
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