Quantico 3×12 Promo “Ghosts” Season 3 Episode 12 Promo Quantico 3×12 “Ghosts” Season 3 Episode 12 Promo – Conor Devlin continues to seek revenge as someone from Alex’s past comes back into her life, on ABC’s “Quantico,” airing Friday, July 27th on ABC, streaming and on demand. Show More… 26 Comments Related Videos Quantico 1×10 Sneak Peek #2 “Quantico” (HD) Quantico 1×10 Sneak Peek “Quantico” (HD) Quantico 1×10 Season 1 Episode 10 “Quantico” Promo (HD) Quantico (ABC) “America Is Going Crazy For Quantico” Promo HD