Elena gets a lower-than-expected grade on a test and tries to get her grades up.

Tired of the lack of diversity in Pembroke's staff, Ji-Yoon makes a bold decision during a faculty soiree. A video from Bill's lecture causes a stir.

Helen and Dale's new alliance has become the talk of the office as they cover the much-hyped return of Halley's Comet. The closer Dale draws to Helen, the more he finds himself thrust into the spotlight.

Reeling from Will's escape, Emma and Julien must do everything they can to stop the next attack. If they can follow the clues and find Will, perhaps they can succeed.

When an attempt is made on a billionaire businessman's life, Professor T suspects the culprit may be much closer to home than the police suspect. Meanwhile, it's Professor T's birthday and with it comes a haunting childhood memory.