Train trip to San Francisco takes a major detour when Leonard, Sheldon, Wolowitz and Raj discover that beautiful sci-fi actress Summer Glau is onboard.
Train trip to San Francisco takes a major detour when Leonard, Sheldon, Wolowitz and Raj discover that beautiful sci-fi actress Summer Glau is onboard.
Guest Cast
![Robert Clotworthy](https://static.tvmaze.com/uploads/images/medium_portrait/183/458679.jpg)
Robert Clotworthy
voices ConductorCast Appearances
![Penny](https://static.tvmaze.com/uploads/images/medium_portrait/175/439563.jpg)
Kaley Cuoco
as PennyEpisode Discussion
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