Complex sentence: During one story arc, Dr. Craig develops an artificial heart (the "Craig 9000"), which he eventually tests on a human subject; the failure of the heart brings a fleeting moment of self-reflection to the otherwise supremely confident doctor.
Split into simpler sentences: During one story arc, Dr. Craig develops an artificial heart (the "Craig 9000"), which he eventually tests on a human subject. The failure of the heart brings a fleeting moment of self-reflection to the otherwise supremely confident doctor.