Penny and Leonard Take Another Crack at Coupledom

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Leonard and Penny, together again?
Tonight in The Big Bang Theory's 100th episode landmark, a Priya-less Leonard decides to give his relationship with Penny another go, asking his old flame out to a spur-of-a-moment, romantic dinner for two which she accepts.
While the date starts out with a bang, unforeseen events unfortunately thrust the couple back to square one.
The Big Bang Theory airs Thursdays on CBS.