El Bison El is a Dorset man of the planet Delta Sigma IV who is responsible for the first outbreak of violence in murdering Unoo of Huni and then spreading the "Illness of violence" amongst the unprepared population. El Bison El was chased and eventually captured by Kyle Riker and his son William T. Riker. (ST - A Time to... novels: A Time to Love, A Time to Hate)