Elementary - Red Light, Green Light

"Red Light, Green Light" offers a few twists as Holmes (Jonny Lee Miller) and Watson (Lucy Liu) investigate a traffic accident which initially appears to be an act of terrorism, then looks more like a gang attack, but after further investigation proves to be nothing more that the tragic result of some sophisticated corporate espionage. The main story is memorable for Captain Dwyer (Rob Bartlett) getting an upclose look at his consultants accusing a group of federal agents of being responsible for the accident as a way to further their own goals to take down a local gang as well as the return of Castle's Jon Huertas reprising his role as a (now former) member of the gang.

The season-long mystery continues as well with Gregson (Aidan Quinn) waking up in the hospital and not corroborating the chain of events his would-be-killer (Mac Brandt) confessed to last week. Separate trips to both the prisoner and his wife (Heléne Yorke) confirm Watson's suspicions that there is obviously far more going on than any one is willing to admit but getting her no closer to what that might be. Both Meers and his wife appear to be caught up in some grand conspiracy. Could this be the show foreshadowing the long-awaited return of a fan favorite?