09/07/2012 05:35 pm ET

Ryan Lochte's '30 Rock' Cameo, Simon Cowell Bashes 'The Voice' And More: What TV Taught Us This Week

The TV world was full of surprises this week.

After spending an entire season exploring sex and relationships on "Girls," it was revealed that Lena Dunham was dating Fun. guitarist Jack Antonoff, while Olympic swimmer Ryan Lochte announced his cameo on "30 Rock."

Meanwhile, Simon Cowell used Britney Spears as his secret weapon while calling out NBC and "The Voice," and we learned that Tina Fey was headed to the world of animation to voice Lisa's substitute teacher on "The Simpsons."

Click through our slideshow for a roundup of what happened in the world of TV this week and what we learned from it.

What TV Taught Us This Week