  Our current knowledge of M31's dwarf spheroidal companions is reviewed. Two
topics of recent interest constitute the bulk of this review. First,
color-magnitude diagrams reaching below the horizontal branch have been
constructed for two M31 dwarf spheroidals based on images from HST/WFPC2. The
horizontal branches are predominantly red in both galaxies, redder than
expected for their metallicity based on Galactic globular clusters. Thus, the
second parameter effect is seen in the M31 halo. Second, recent surveys have
revealed three new dwarf spheroidal companions to M31. Thus, dwarf spheroidal
galaxies are not as rare around M31 as previously thought and as a result, some
properties of the M31 companion system have changed.
