Exeunt (Series Finale) Question (Spoiler)

In the final minutes of the show, Morse loaded up a single chamber of the revolver he’d recently acquired from Thursday, spun the cylinder and then fired it off camera. By all appearances it looks like he intended to play Russian Roulette. Of course we see him still alive a bit later. So, are we to believe he aimed the gun at his head, pulled the trigger, survived and then fired the gun in a different direction? If so, why? Because he was despondent about missing his chance with Joan and the departure of his colleagues and didn’t care if he lived or died? Seemed out of character for him.