Let me start by saying how I thought the subtle nods to Crabtree's past loves was a nice touch, beginning with Murdoch and Julia discussing Dr. Grace's congrats on the baby and Julia confirming she mentioned George's upcoming nuptials, to the Inspector mentioned Edna not being prosecuted for her husband's death, to the sign in the window behind Watts in his friend of an upcoming reading by Lucy Montgomery to the poster put up in Mrs. Hart's salon of Nina Bloom's performance, was all a nice touch.
Next up: I'm not really certain if Yannick was directing himself in the first half of this episode, but his acting was off to me. Early on he look like he was trying to keep from laughing, considering someone was trying to kill him, his demeanor just seemed to blasé. However, his acting became a bit more true to character as the episode progressed.
Lastly, Johnny Harris' voice has gotten hoarse throughout this season, and his character seems a bit more subdued he has lacked the energy and naivete that was such an endearing part of his character. It almost feels like he is no longer into playing George Crabtree.
In his defense, I will say Johnny has been playing the same character for 15 years, and people grow and expand and so should the characters, so perhaps he is just projecting a more mature version of the Character, considering all the twist and turns his character's life have taken it isn't realistic that he would still be our naive bugalugs.