If you were looking for a different series, "Ghost Town" or "Ghost"-related themes often appear mid-season: Season 4, Episode 5: Ghost Town
Carrie attempts to extend an "olive branch" to Aidan, but their reunion is marked by coldness and awkwardness. Other Notable S4E5 "Ghost" Episodes [S4E5] Ghost Town
Carrie and Miranda are both confronted by "ghosts" from their pasts. For Carrie, this manifests when she receives an invitation to the opening of a bar, Scout, co-owned by her ex-boyfriend Aidan. Miranda literally believes her apartment is haunted by a ghost, though it is ultimately revealed to be a more metaphorical haunting linked to her past with Steve. If you were looking for a different series,
This episode explores the idea that New York is "haunted" by the spirits of past relationships. [S4E5] Ghost Town