The Best Episodes Written By Lee Aronsohn

Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.

Jake is getting ready to start a new school as he graduates to Junior High. Alan and Charlie take him school shopping and find themselves in trouble.

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

Charlie is dating a woman whose personality and life are like his mother’s.

When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.

Charlie has trouble keeping up with Mia's healthy lifestyle, so he begins to sneak beers, cigars, and burgers behind her back. When Mia finds out what he was doing, Charlie has to decide if he is truly in love with her or just whipped.

Charlie's friends and family put a crimp in his plan for a romantic Christmas Eve date. When Evelyn sees who the date is, she goes to great lengths to force a wedge between them.

Charlie is shocked when the handyman working on his house beats him out for Chloe's affections. Alan has no sympathy for Charlie’s distress.

Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.

Penny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.

The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.

Sheldon winds up in traffic court when he gets a ticket because of Penny.

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

A girl from Jake’s school invites him to his first boy-girl party. Charlie and Alan help him get ready for it by giving him advice. Alan and Charlie get nostalgic and remember their first boy-girl party.

Charlie writes a children’s song and finds success as Charlie Waffles. The children love him and the mothers seem to as well. Charlie's new found fame irritates Alan.

With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer.

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn't a clue what she's in for.

Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day.

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.

While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.