| Vol 1 001: Hearts of Steel - Part 1 |
 | An ice age disrupts the Autobot/Decepticon war on an ancient Earth, causing both factions to go into hibernation. Bumblebee wakes up in the 1800s to see John Henry laying down railroad tracks. He decides he wants to help, and gives himself a handy locomotive alt. mode. Meanwhile Tobias Muldoon is demonstrating his submarine invention to Mark Twain and Jules Verne, but it is a failure. However, Muldoon is sought out by Shockwave, who wants to reshape the future of the Earth. | more details |
| Vol 1 002: Hearts of Steel - Part 2 |
| Bumblebee demonstrates how machines can be used to make railroad tracks, and later reveals his identity to John Henry. Meanwhile, Muldoon gets mixed up with those bad Decepticons. They trick him into building a facility, they steal money to finance it, and give themselves new alt. modes. When he overhears their real intentions he flees to San Francisco to get help. | more details |
| Vol 1 003: Hearts of Steel - Part 3 |
| Tobias Muldoon tells Twain, Merriweather and his foxy daughter Kitty all about his holiday with the Decepticons, and they're convinced its the truth when Ravage attacks (and is subsequently caught in a gas explosion). They send the cavalry into the desert but the Decepticons have already moved on after realising the Autobots have reactivated. Bumblebee and the Autobots are also on their trail, with John Henry in tow. | more details |
| Vol 1 004: Hearts of Steel - Part 4 |
| John Henry and the Autobots team up with Mark Twain and co as they try and catch up with the Decepticons. Scourge attacks from the sky in a cool airship form, but they blow him up. Bumblebee then sends the Decepticon train down the wrong set of tracks, leading them conveniently over the edge of a cliff. Then the Autobots bugger off and go back to bed, catching up on another forty million winks. | more details |
