IMDB: Elementary: S5E12 – 2017
IMDB Rating: 8.2/10
Rotten Tomatoes: 100% (season)
As Sherlock & Dr Watson investigate the death of a clown (it is ironically hilarious to see a clown afraid of something and being chased through a dark a spooky forest), they begin to discover that it is somehow linked to the creation of a virus that has been weaponised.
Dr Watson also helps out their cop friend Bell after he gets targeted by his new love interest recently ex-husband (as if no-one has ever had to deal with their partners crazy ex before).