Did the voice of Mumm-Ra in Thundercats (1985) - one of the
most fearsome cartoon villains of the 1980s.
Hammond provided the voice for another well known 1980s villain, in
addition to Thundercats (1985)' Mumm-Ra; he provided the voice of 'Megatron', in a
series of read-a-long Transformers book and record sets from the
mid-1980s.
Between 1974 and 1982, he appeared in 189 episodes of "The CBS Radio
Mystery Theater."