Katherine McNamara debuted in the seventh season of Arrow as Mia, daughter of Oliver Queen/Green Arrow and Felicity Smoak, in the secondary storyline of the season, set in 2040. She returned in season 8, in which her character went back to 2019, and she took part in the crossover Crisis on Infinite Earths.
After crossover, the penultimate episode of Arrow was a backdoor pilot for her own spin-off show Green Arrow and the Canaries, in which she was set to star with Katie Cassidy and Juliana Harkavy. Unfortunately, the spin-off wasn’t picked by The CW even though the pilot ended with a few cliffhangers.
But, Mia’s path in the Arrowverse didn’t end with Arrow. Almost two years after her latest appearance, Katherine will return as the new Green Arrow, the successor of the late Oliver Queen. It was previously announced that she’ll return in the crossover event Armageddon, which is the current storyline in The Flash show, and now we know that Mia will return in the final, fifth part of Armageddon, thanks to the official synopsis of the episode:
THE EXCITING CONCLUSION TO THE FIVE PART ARMAGEDDON EVENT BRINGS THE RETURN OF MIA QUEEN
The conclusion to Armageddon presents an opportunity for The Flash (Grant Gustin) to end his lifelong battle with Reverse Flash (guest star Tom Cavanagh) for good, but the payoff could be too much for Barry and team to handle. Meanwhile, Mia Queen (guest star Katherine McNamara) drops in from the future looking to save a lost loved one, and she won’t let anything stand in her way.The CW
The backdoor pilot for Green Arrow and the Canaries ended with Mia’s brother William being kidnapped, which was one of the cliffhangers the episode left. When we look at this new synopsis, it’s presumed that person she wants to save is William, or maybe even John Diggle Jr., her fiancé.
So far, two parts of Armageddon were released, and there are three more to go. The fifth, final part, will air on December 14.
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