Complex sentence: In another episode, Noland hypnotizes a patient, Alice Ghostley,--and Nurse Turner by accident as well--an act which nearly costs the hospital a large donation from a potential benefactor, Charles Lane.
Split into simpler sentences: In another episode, Noland hypnotizes a patient, Alice Ghostley and, accidentally, Nurse Turner as well. This nearly costs the hospital a large donation from a potential benefactor Charles Lane.