I am planning on running the tabletop RPG adventure, The Vanished, and, I was just wondering what would be a good episode to have the players watch beforehand. Any thoughts? Many adventures have an obvious tie-in to a specific episode, like “Ghosts of Conscience” to “The Tholian Web,” or A Doomsday Like Any Other to “The Doomsday Machine.” But The Vanished is a lot less obvious. I’m thinking maybe “The Enemy Within” or something else that deals extensively with transporter malfunctions. I’m thinking maybe “Dagger of the Mind” or something else which begins with the Enterprise approaching a Federation facility and having a nominally friendly subspace radio chat. I’m thinking maybe “Operation—Annihilate!” to help set up the idea of the I’lglii. Any thoughts?