When a ballerina at the ballet is murdered, all eyes are on the ballerina who took her spot. When it's revealed that the deceased and the presumed killers were lovers, they look elsewhere. When it comes back to the lawyer, it is revealed he did it to further his career.
Sherlock has a few sexual encounters with various women, included the ballerina suspect, and Watson does not approve.
Joan goes about her own way to find a missing homeless man only to discover that a couple were keeping homeless veterans captive in order to benefit from their benefits.
While investigating her case, Watson reveals that her father has schizophrenia and is a homeless man in New York City. "Watson" was the surname she adopted from her step-father.