Logline
Who knows? They never released one.
Edit: They finally released one - how novel to release the actual episode first!
Captain Freeman assigns the Lower Deckers an overly safe mission to try and keep a self-destructive Mariner out of danger.
Written by: It’s a secret (it was Mike McMahan)
Directed by: We’re not tellin’ (it was Brandon Williams)
Hiding in plain sight, perhaps?
Alternatively, maybe he built the ship, but it’s being used by someone else.
But the mystery ship is already built… implying they’ve had him for quite a while now. Why search for something they already have?