Rose McIver's character mistakes the ghosts for zombies. A ghost replies "Zombies? Zombies aren't real." Rose McIver played a zombie detective in the show iZombie (2015-2019)
Richie Moriarty (Pete) also played one of the basement ghosts in this episode and the previous one.
Sassapis mentions Isaac dying of dysentery two weeks after the Colonial Army's abandonment of Fort Ticonderoga on July 5, 1777, placing his death date on or around July 19, 1777.