Complex sentence: This L.M.D. was so thoroughly reprogrammed that it believed itself to be the resurrected Glenn Talbot, complete with all of Talbot's memories including his love for Betty Ross; the real Talbot is presumed to have remained dead all this time.
Split into simpler sentences: This L.M.D. was so thoroughly reprogrammed that it believed itself to be the resurrected Glenn Talbot, complete with all of Talbot's memories including his love for Betty Ross. The real Talbot is presumed to have remained dead all this time.