| 0 | Whys and Wherefores | cover | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale | Yorick Brown |
| 1 | Table of Contents | table of contents | 3 | pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol | |
| 2 | Cover - Y: The Last Man #55 | cover reprint (on interior page) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Yorick Brown; Agent 355; Ampersand |
| 3 | Whys and Wherefores, Part 1 | comic story | 22 | script: Brian K. Vaughan; pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol; letters: Clem Robins; editing: Will Dennis, Casey Seijas | Yorick Brown; Agent 355; Ampersand; Vladimir Lenin (corpse); Hero Brown; Beth II; Beth, Jr.; Natalya Zamyatin; Dr. Ciba Weber; Vladimir Weber; Beth Deville (dream); Lt. General Alter Tse'Elon; Eliana |
| 4 | Cover - Y: The Last Man #56 | cover reprint (on interior page) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Hero Brown; Natalya Zamyatin; Dr. Ciba Weber; Vladimir Weber |
| 5 | Whys and Wherefores, Part 2 | comic story | 22 | script: Brian K. Vaughan; pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol; letters: Clem Robins; editing: Will Dennis, Casey Seijas | Yorick Brown; Agent 355; Ampersand; Hero Brown; Beth II; Beth, Jr.; Natalya Zamyatin; Dr. Ciba Weber; Vladimir Weber; Beth Deville; Lt. General Alter Tse'Elon; Eliana (death) |
| 6 | Cover - Y: The Last Man #57 | cover reprint (on interior page) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Ampersand; Beth Deville |
| 7 | Whys and Wherefores, Part 3 | comic story | 22 | script: Brian K. Vaughan; pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol; letters: Clem Robins; editing: Will Dennis, Casey Seijas | Yorick Brown; Agent 355; Ampersand; Hero Brown; Beth II; Beth, Jr.; Beth Deville |
| 8 | Cover - Y: The Last Man #58 | cover reprint (on interior page) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Agent 355 |
| 9 | Whys and Wherefores, Part 4 | comic story | 22 | script: Brian K. Vaughan; pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol; letters: Clem Robins; editing: Will Dennis, Casey Seijas | Yorick Brown; Agent 355 (death); Ampersand; Hero Brown; Beth II; Beth, Jr.; Natalya Zamyatin; Dr. Ciba Weber; Vladimir Weber; Beth Deville; Lt. General Alter Tse'Elon |
| 10 | Cover - Y: The Last Man #59 | cover reprint (on interior page) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Ampersand |
| 11 | Whys and Wherefores, Part 5 | comic story | 22 | script: Brian K. Vaughan; pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol; letters: Clem Robins; editing: Will Dennis, Casey Seijas | Yorick Brown; Agent 355 (corpse); Ampersand; Hero Brown; Beth II; Beth, Jr.; Natalya Zamyatin; Dr. Ciba Weber; Vladimir Weber; Beth Deville; Lt. General Alter Tse'Elon (real name revealed to be Yedida) |
| 12 | Cover - Y: The Last Man #60 | cover reprint (on interior page) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Yorick Brown |
| 13 | Alas | comic story | 48 | script: Brian K. Vaughan; pencils: Pia Guerra; inks: José Marzán Jr.; colors: Zylonol; letters: Clem Robins; editing: Will Dennis, Casey Seijas | Yorick Brown; Dr. Allison Mann [Ayuko Matsumori] (flashback); Agent 355 (flashback); Yorick Brown the Seventeenth (clone); Catherine; Ampersand (death); Hero Brown; President Beth, Jr.; Rose Copen; Dr. Allison Mann (clones); Beth Deville |
| 14 | Backcover | promo (ad from the publisher) | 1 | pencils: Massimo Carnevale; inks: Massimo Carnevale; colors: Massimo Carnevale; editing: Will Dennis, Casey Seijas | Agent 355; Yorick Brown; Ampersand; Beth Deville |