| Pro | Gus | | Eben's sailplane teacher. |
| | Chuck | | A skydiver Eben had collision with in middle of the sky. |
| | Eben | Alexander III | A neurosurgeon. Protagonist and Narrator. Aka: Dr. A. |
| | | | NDE - Near Death Experience. |
| 1 | Holley | Alexander | Eben's wife. |
| | Vic | | Eben's college roommate Holley formerly dated. |
| | Bill | Wilson | Eben and Holley's bestfriend. |
| | Patty | Wilson | Bill's wife. Eben and Holley's bestfriend. |
| | Eben | Alexander IV | Eben and Holley's son. |
| | Bond | Alexander | Eben and Holley's son. |
| | | | KPC - Klebsiella Pneumoniae Carbapenemase. |
| 2 | Laura | Potter | Former workmate.
Physician when Eben was taken to ER. |
| 3 | Dr. Robert | Brennan | One of Laura's associates.
Infectious diesease specialist. |
| 4 | | | CSF - Cerebrospinal Fluid. |
| | | | APACHE II - Acute physiology and chronic health evaluation. |
| | Michael | Sullivan | Eben's neighbor. A rector in Episcopal Church. |
| | Sylvia | White | Holley's longtime friend. |
| | Betsy (1) | Alexander | Eben's youngest sister in his adoptive family. |
| | Jean | Alexander | Eben's oldest sister in his adoptive family. |
| | David | | Jean's husband. |
| 6 | | | MRI - Magnetic Resonance Image. |
| 9 | Henry | Vaughan | A 70th century Christian poet. |
| | Betty | Alexander | Eben's adoptive mother. |
| | Eben | Alexander Jr. | A neurosurgeon. Eben's adoptive father. |
| | Donald | Matson | Eben Jr's classamate at Harvard. |
| | Dr. Frand | D Ingraham | The last residents trained by Dr. Harvey. |
| | Dr. David | L. Kelly | Eben Jr's long-time partner. |
| 11 | Ann | Michael | Eben's biological mother. |
| | Richard | Michael | Eben's biological father. |
| | Kathy | Michael | Eben's biological sister. |
| | David | Michael | Eben's biological son. |
| | Dr. Crawford | | Ann's ob-gyne on her first child. |
| | Virginia | Dare | Ann's first child. |
| | Bob (1) | | Richard's brother. |
| | Bob (2) | | Richard's brother-in-law. |
| | Betsy (2) | | Eben's biological sister. |
| 14 | Albert | Einstein | A theoretical Physicist. |
| 15 | Isaac | B. Singer | An American-Polish writer. |
| 16 | Susan | Reinthes | Holley's close friend. |
| 17 | Dr. Jay | Loeffler | Former partner developing stereotatic radiosurgery program. |
| | Steve | Tatter | Eben's friend. A neurosurgeon. |
| 19 | Peggy | | Eben's sister-in-law. Holley's sister. |
| | Robbie | | Betsy Alexander's husband. |
| | Kate | | Robbie and Betsy's daughter. |
| 20 | Page | Sullivan | Michael's wife. |
| 21 | Dr. Scott | Wade | Eben's main doctor. |
| 25 | Jackie | | Holley's friend. |
| | Ron | | Jackie's husband. |
| 28 | Soren | Kierkegard | A Danish pilosopher. |
| 29 | Raymond | Moody | Medical student published a book called "Life after Life". |
| | George | Ritchie | Man in Moody's book who had near death experience. |
| 30 | Herman | Melville | An American novelist. |
| | George | | Sussanna's late husband. |
| 31 | John | Eccles | A neurophysiologist. |
| | | | REM - Rapid Eye Movement. |
| | John | | Eben's friend and colleague whom he visits after coma. |
| 33 | Rene | Descartes | A French philosopher. |
| | Werner | Heisenberg | A 1920s Physicist. |
| | David | Chalmers | The author of the book called "The Brilliant Mind". |
| | | | TOE - Theory of Everything. |
| | Wolfgang | Pauli | One of the fathers of Quantum Physics. |
| | Niels | Bohr | One of the fathers of Quantum Physics. |
| | Erwin | Schrodinger | One of the fathers of Quantum Physics. |
| | James | Jeans | One of the fathers of Quantum Physics. |
| | Robert | Monroe | The father of the Monroe Institute in Faber, Virginia. |
| 35 | Elisabeth | Kubler-Ross | The author of the book called "On Life After Death". |
| | | | Eternea - A nonprofit publicly supported charity Eben founded. |
| | John | R. Audette | Eben's colleague and friend. Eben's co-founder of Eternea. |
