Here's the official guide of Elementary episode 16 "Details" -- due to air on Thursday, Feb. 14 on CBS.
SHERLOCK INVESTIGATES WHAT APPEARS TO BE AN OPEN-AND-SHUT CASE AFTER DETECTIVE BELL IS ATTACKED WHILE OFF DUTY ---
- Sherlock investigates what he believes will be an open-and-shut case after Detective Bell is attacked. However, the case takes an unexpected turn when the suspected assailant is found dead.
- Meanwhile, Sherlock encourages Joan to learn self-defense.