  The isolated globule B335 contains a single, low luminosity Class 0 protostar
associated with a bipolar nebula and outflow system seen nearly perpendicular
to its axis. We observed the innermost regions of this outflow as part of
JWST/NIRCam GTO program 1187, primarily intended for wide-field slitless
spectroscopy of background stars behind the globule. We find a system of
expanding shock fronts with kinematic ages of only a few decades emerging
symmetrically from the position of the embedded protostar, which is not
directly detected at NIRCam wavelengths. The innermost and youngest of the
shock fronts studied here shows strong emission from CO. The next older shock
front shows less CO and the third shock front shows only H_2 emission in our
data. This third and most distant of these inner shock fronts shows substantial
evolution of its shape since it was last observed with high spatial resolution
in 1996 with Keck/NIRC. This may be evidence of a faster internal shock
catching up with a slower one and of the two shocks merging.
