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Leslie holds a sex-education class following an STD outbreak among senior citizens in Pawnee; when Tom's gadgets are taken away, Ron helps him acclimate to life without technology; April and Ben meet Congressman Murray.

Ben gets a job offer, forcing Leslie to think about their future; Ron and Andy take Diane's girls trick-or-treating; Tom looks for a new business idea.

Leslie meets Ben's parents; Jean-Ralphio helps Tom prepare the pitch for his new business idea; Chris has mood swings.

April tries to get Lot 48 turned into a dog park, upsetting Leslie; Tom gets Ben's help with his new business idea; Andy improves his crime scene investigation skills.

Leslie asks the public for park design suggestions but is suspicious when the best design comes from an Eagleton architect; Tom asks the office for help with his new business; Andy tries to make his job as a security guard exciting.

Everything could change when Leonard spontaneously invites Penny to a romantic dinner.

Penny and Leonard experiment with their new relationship; Raj forms a bond with his phone's virtual assistant.

Leonard starts to reconsider his friendship with Sheldon; Wolowitz tries to choose his astronaut nickname.