| Title | Season | Episode # | First Aired |
|---|---|---|---|
| Infested Island | 4 | 121 | |
| Chunnel | 4 | 122 | |
| El Dorado, The Lost City of Gold | 4 | 123 | |
| The Sword | 4 | 124 | |
| Long Live Rock | 4 | 125 | |
| Long Live Rock | 4 | 126 | |
| Kindergarten Commandos | 4 | 127 | |
| Keyboard Warriors | 4 | 128 | |
| The Greatest Evil - Part One | 4 | 129 | |
| The Greatest Evil - Part Two | 4 | 130 | |
| A is for Android | 4 | 131 | |
| The Sludge Factor - Part One | 4 | 132 | |
| The Sludge Factor - Part Two | 4 | 133 | |
| Cobra World | 4 | 134 | |
| Messenger from the Deep | 4 | 135 | |
| The Eliminator | 4 | 136 | |
| Metal-Head's Reunion | 4 | 137 | |
| Shadow of a Doubt | 4 | 138 | |
| Basic Training | 4 | 139 | |
| The Legend of Metal-Head | 4 | 140 |