[s2e17] The Terminator — Decoupling

In a highlight of the season, Penny loses patience with Sheldon’s complex instructions and simply smashes his puzzle box to get the drive.

Sheldon must guide Penny into his "sanctum sanctorum" (his bedroom) via phone.

Sheldon insists on taking the train rather than flying. [S2E17] The Terminator Decoupling

Sheldon remains entirely indifferent to her celebrity, viewing her existence as a potential Skynet infiltration plot. 3. The "Penny-Sheldon" Remote Interaction

While the boys are on the train, Sheldon realizes he left a flash drive with his research paper at the apartment. In a highlight of the season, Penny loses

Raj manages to talk to her after drinking what he thinks is beer, only to lose his "magic" when Howard reveals it is non-alcoholic.

It takes seven times as long as a flight and costs twice as much. Raj manages to talk to her after drinking

Howard uses the pun "It's hot in here, must be Summer," which backfires so spectacularly that she eventually breaks his phone.