Okay so let me get this straight
*Sherlock finds John regaining consciousness on the therapist’s floor after being shot with a tranquilizer gun for absolutely no reason, Eurus nowhere to be found because she just likes to tranquilize people and then run away as a prank*
Sherlock: John, are you alright? What happened?!
John: Well apparently I just met your secret sister and she shot me but I’m okay
*long pause while Sherlock runs complex scenarios in his mind, neurons firing, camera spinning around him as he uses his deduction powers to the fullest*
Sherlock: John. We need to hire a scary clown