Appearing in "Like Father!"
- Kevin Masterson (Main story and flashback)
- Marcy Steele
- Bobby Steele
- Secret Avengers
- Rakesh Vanamala (First appearance)
- Coach Kress (Coach at the Maria Stark Academy)
- Ms. Silverstein (Principal of the Maria Stark Academy)
- Sateesh Vanamala (First appearance)
- Gruenhilda (Shadow only)
- Hecara (Shadow only)
- Thunderstrike (Eric Masterson) (Only in flashback)
- Avengers (Only in flashback)
Synopsis for "Like Father!"
At the Maria Stark Academy, Kevin Masterson is apparently at it again, fighting another student. After his mother and step-father pick him up, they try to talk to him, but he's again not listening. After walking off alone, he is met by Sharon Carter who takes him to meet Steve Rogers. Rogers informs him that he recently came into possession of an item and believed it should be given to it's rightful owner - the Thunderstrike mace. Kevin picks it up expecting to be transformed, but nothing happens. Feeling like he's being taken advantage of, he has Sharon drop him off. As Kevin tries to figure out what to do now, the Rhino attacks an armored vehicle, causing a woman and her child to become trapped in a flaming car. While trying to use the mace as a prybar to help get the child out after another bystander has saved the mother, the car explodes. Strangely, Kevin is alright and has protected the child, but he has also seemingly transformed into his father Eric Masterson's Thunderstrike form.
Appearing in "Only Human!"
- Gruenhilda (First full appearance)
- Thor (Only in flashback)
- Eric Masterson (Only in flashback)
- Mongoose (Only in flashback)
- Jerry Sapristi (Only in flashback)
- Kevin Masterson (Only in flashback)
- Marcy Masterson (Only in flashback)
- Bobby Steele (Only in flashback)
- Loki (Only in flashback)
- The Avengers (Only in flashback)
- Mjolnir (Only in flashback)
- Thunderstrike (Item) (Only in flashback)
- Bloodaxe (Enchanted Axe) (Only in flashback)
- Captain America's Battle Armor (Only in flashback)
Synopsis for "Only Human!"
In Valhalla, the transformation of Kevin Masterson into his father's form has alerted the Asgardians that the mace Thunderstrike is once again active. Hecara and Sif explain to Gruenhilda the importance of her mission - to teach Kevin how to be a hero.
A proud legacy continues! Eric Masterson was the first to wield the enchanted mace called Thunderstrike and he sacrificed himself to save the world. But what happened to the mace? Has it been lost for all eternity or does the world still need heroes? Has the time finally come for someone else to follow Eric’s journey and take on the mantle of Thunderstrike? Join us as the Marvel Universe welcomes back the everyman Avenger, THUNDERSTRIKE! Guest-starring Steve Rogers, Sharon Carter and the rampaging Rhino!