Gabriel Luna appeared as the car version of the Ghost Rider offering forth his own version of vengeance on those deemed guilty. For those not familiar with the comics, the Robbie Reyes version of Ghost Rider is a bit different than the Johnny Blaze and Dan Ketch versions. Just from watching tonight's episode it seems as if Agents of SHIELD may stick pretty close to Robbie's origins in the comics, so you may want to avoid spoilers. Some differences include that Robbie Reyes is not a "true" Spirit of Vengeance, and he also may not have the Penance Stare.
Check out footage below of Ghost Rider's first transformation from tonight's episode. You can watch the preview here for next week's featuring Ghost Rider vs Quake.
Marvel's Agents of SHIELD airs Tuesdays at 10pm ET on ABC.