The film was later released on DVD as both Reactor and War of the Robots.
The 4 films in Alfonso Brescia’s 1978 sci-fi series are Cosmos: War of the Planets (1978, a.k.a. Year Zero War in Space), Battle of the Stars (1978, a.k.a. Battle in Interstellar Space), War of the Robots (1978, a.k.a. Reactor) and Star Odyssey (1979, a.k.a. Seven Gold Men in Space)
Antonio Sabato as Captain John Boyd
Yanti Somer as Julie
Malisa Longo as Lois
Giacomo Rossi Stuart as Roger
Aldo Canti as Kuba the Alien
Licinia Lentini as Commander King’s assistant
Venantino Venantini as Paul
Jacques Herlin as Professor Carr
Public Domain Status:
The film has fallen in the public domain in the United States (not in Italy).
By Al Bradley (https://archive.org/details/WarOfTheRobots) [Public domain], via Wikimedia Commons