Possibility Two
![](https://image.tmdb.org/t/p/original/qGg817buY5P1NUDiPnSyQpa6fZr.jpg)
- Runtime
- 43m
- Air Date
- Aired Feb 21, 2013
Sherlock investigates a case involving a wealthy philanthropist who believes his incurable illness was given to him on purpose. Meanwhile, Sherlock tries to teach Joan his deductive skills by sending her to a suspicious dry cleaning establishment.
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