 The group also receives support from Laurel and Sara's father, Detective Quentin Lance (Paul Blackthorne).During the first five seasons of the show, characters from Oliver's past appear in a separate story arc based on Oliver's flashbacks, which highlight parallels from Oliver's history that shape events in the main story.Starting with season seven, a series of flash-forwards focus on Oliver's children William and Mia, exploring how present events would affect their future and Green Arrow's legacy.