This is the farthest back in time (1692) that any episode has taken place in.
The man shown in chains accused of being a witch is Samuel Wardwell. He was hanged along with the other women that day. He also happens to be the ancestor of actor Scott Foley and is discussed on his episode ("Scott Foley (2016)") of the genealogy show Who Do You Think You Are? (2010).
Shawn Ryan, the executive producer of this show, also ran The Unit (2006), which Foley was the lead actor in.
Shawn Ryan, the executive producer of this show, also ran The Unit (2006), which Foley was the lead actor in.
When Flynn says he "knows witches" in this episode, it could be a nod to Goran Visnjic's role in Practical Magic (1998).
Henri Lubatti, who plays Judge Hathorne, also appeared in an episode of Salem (2014), which is also (loosely) about the Salem witch trials.
"Agents of Satan (1982)", an episode of Voyagers! (1982), also featured time travelers visiting Salem where Abiah Folger is accused of being a witch and condemned to death.