Tess Jantzen is a fictional character portrayed by Olivia Nikkanen in the TV series Elementary.
In the first episode they appeared in, titled Seed Money (season 3), they were 16 years old.
They appear in 1 episodes out of a total of 154 aired
Episodes1
Seed Money
episode S3.E10 january 2015While Kitty tries to find a runaway teen, Sherlock and Joan work a case in which the murder of a brilliant bioengineer looks to be at the hands of a drug cartel. Also, Joan makes a major life decision but worries it will impact Sherlock negatively, not knowing that Sherlock has big news of his own.