The Divide Between Sherlock and Watson Grows in Elementary’s “The Grand Experiment”

Rising tension between Sherlock and Watson will bring their partnership to a crossroads in Elementary‘s May 15th finale.

ScreenSpy has first details on the series’ season ender, which you can find below.

The episode will see Sherlock’s brother Mycroft (Rhys Ifans) facing accusations of treason and murder, a situation that only adds to the already brewing tension between Sherlock and Watson.

This spat is unlike any that have come before,  and the growing rift between the duo will threaten to compromise one of the most important cases of their partnership.

They will endeavor to put their differences aside while they help Sherlock’s brother, but what happens when the case is over?

Find out in Elementary‘s season finale “The Grand Experiment,” airing Thursday May 15 at 10:01 – 11:00 pm ET/PT on CBS.