Five teenagers discover they're the only defense against an alien invasion nobody knows is happening. The robot they pilot isn't a weapon they control, it's a living thing that demands they trust each other absolutely, or it won't transform. Nagahama built this show around a simple, brutal rule: the mecha responds to the strength of your bond with your teammates, which means every episode forces you to choose between ego and survival. The aliens are relentless. The romance between pilots matters more than any fight sequence. By 1976, this was radical, a giant robot show that cared more about whether these five people could actually become a team than whether they could win the next battle.
Five young people discover they're the only ones capable of piloting Combattler V, a colossal electromagnetic robot designed to defend Earth against an otherworldly threat. Thousands of years ago, aliens from planet Campbell set out to colonize new worlds. Now they're waking up, and Earth is next on their list of targets. The Campbellians unleash massive bioengineered creatures to soften humanity's defenses, but each attack triggers a response from the defense force commanding Combattler V. The five pilots must learn to synchronize their abilities and trust each other completely. Their personal differences and individual strengths become either assets or liabilities depending on how well they work as a unified force. As battles escalate and the Campbellians reveal their true scale of invasion, the pilots confront not just external enemies but their own doubts about whether they're truly humanity's last line of defense. This is classic mecha action grounded in the idea that extraordinary teenagers hold the weight of an entire species on their shoulders. Giant robot combat meets high-stakes drama where every pilot matters.