We address the problem of topologically characterising simple closed geodes
ics in the figure-eight knot complement. We develop ways of finding these g
eodesics up to isotopy in the manifold, and notice that many seem to have t
he lowest-volume complement amongst all curves in their homotopy class. How
ever, we find that this is not a property of geodesics that holds in genera
l. The question arises whether under additional conditions a geodesic knot
has least-volume complement over all curves in its free homotopy class.
We also investigate the family of curves arising as closed orbits in the su
spension flow on the figure-eight knot complement, many but not all of whic
h are geodesic. We are led to conclude that geodesics of small tube radii m
ay be difficult to distinguish topologically in their free homotopy class.