  We report on the fabrication of Josephson junctions using the topological
crystalline insulator Pb$_{0.5}$Sn$_{0.5}$Te as the weak link. The properties
of these junctions are characterized and compared to those fabricated with weak
links of PbTe, a similar material yet topologically trivial. Most striking is
the difference in the AC Josephson effect: junctions made with
Pb$_{0.5}$Sn$_{0.5}$Te exhibit rich subharmonic structure consistent with a
skewed current-phase relation. This structure is absent in junctions fabricated
from PbTe. A discussion is given on the origin of this effect as an indication
of novel behavior arising from the topologically nontrivial surface state.
