The Doctor, Romana, Adric, and K9 arrive on a planet with a road. K9 can see the projected course for the TARDIS to an extent, but it ends at a "curve in destiny."
- Two roads diverged in a yellow wood,
- And sorry I could not travel both
- And be one traveller, long I stood
- And looked down one as far as I could
- To where it bent in the undergrowth
to be added
- Romana says she never liked metaphysics.
- Adric refers to Robert Frost as "N-Space poetry."
- There are no seasons in the time winds.