Season 4: October 2017 show (2h 25m)

- Act I - Railway Life: part 2 (19:20)
- Act II - Digital structures (28:36)
- Act III - Notch 8: Weathering Steam: 2 (33:49)
- Act IV - Start Small, THINK BIG: Operation (34:31)
- Bonus - A swinging lift-out (2:30)