Dr. Azuma creates robots to benefit mankind, but they unexpectedly rebel and begin to destroy everything in their paths. To deal with the catastrophe, Dr. Azuma's son volunteers to become a human robot, even though he knows he will never be able to return to human form again. He confronts this grave situation to ensure a bright future for all humans.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | An Immortal Challenger | 1973-10-02 | 25 min |
| Season 1 | Episode 2 | Stake Victory on the Moonlight | 1973-10-09 | 25 min |
| Season 1 | Episode 3 | Find Tomorrow in the Ruins | 1973-10-16 | 25 min |
| Season 1 | Episode 4 | Channel Anger into the MF Gun | 1973-10-23 | 25 min |
| Season 1 | Episode 5 | Don't Blow Out the Flame of Battle | 1973-10-30 | 25 min |
| Season 1 | Episode 6 | Raging Wind Flender | 1973-11-06 | 25 min |
| Season 1 | Episode 7 | An Oath to the Hero Kikero | 1973-11-13 | 25 min |
| Season 1 | Episode 8 | The Roar of the Wild Beast Robot | 1973-11-20 | 25 min |
| Season 1 | Episode 9 | Concerto in the Flames of War | 1973-11-27 | 25 min |
| Season 1 | Episode 10 | Stake Life in the Desert of Death | 1973-12-04 | 25 min |
| Season 1 | Episode 11 | Statue of the Demon | 1973-12-11 | 25 min |
| Season 1 | Episode 12 | The Iron Train of Evil | 1973-12-18 | 25 min |
| Season 1 | Episode 13 | Android 5, the Robot of Betrayal | 1973-12-25 | 25 min |
| Season 1 | Episode 14 | The Town That Doesn't Need Casshan | 1974-01-08 | 25 min |
| Season 1 | Episode 15 | Puppy Runs for Vengeance | 1974-01-15 | 25 min |
| Season 1 | Episode 16 | Swanee's Wings of Love | 1974-01-22 | 25 min |
| Season 1 | Episode 17 | The Robot Lullaby | 1974-01-29 | 25 min |
| Season 1 | Episode 18 | Giant Elephant VS. Andro Force | 1974-02-05 | 25 min |
| Season 1 | Episode 19 | The Clown Robot of Terror | 1974-02-12 | 25 min |
| Season 1 | Episode 20 | Casshan Gets the Death Penalty | 1974-02-19 | 25 min |
| Season 1 | Episode 21 | Robot Hijack | 1974-02-26 | 25 min |
| Season 1 | Episode 22 | Runaway Robot, Romeo | 1974-03-05 | 25 min |
| Season 1 | Episode 23 | Great Escape from the Robot Factory | 1974-03-12 | 25 min |
| Season 1 | Episode 24 | Bounder Robot's Challenge | 1974-03-19 | 25 min |
| Season 1 | Episode 25 | Immortal Casshan | 1974-03-26 | 25 min |
| Season 1 | Episode 26 | Casshan's Secrets | 1974-04-02 | 25 min |
| Season 1 | Episode 27 | The Missing MF Gun | 1974-04-09 | 25 min |
| Season 1 | Episode 28 | The Calvary of Anger | 1974-04-16 | 25 min |
| Season 1 | Episode 29 | High-Heat Robot Neo-Taros | 1974-04-23 | 25 min |
| Season 1 | Episode 30 | The Premier Robot Terminator | 1974-04-30 | 25 min |
| Season 1 | Episode 31 | The City That Creates Newly-Built Men | 1974-05-07 | 25 min |
| Season 1 | Episode 32 | The Electric Punch of Tears | 1974-05-14 | 25 min |
| Season 1 | Episode 33 | Swanee in Danger! | 1974-06-11 | 25 min |
| Season 1 | Episode 34 | Casshan VS. Robot Ace | 1974-06-18 | 25 min |
| Season 1 | Episode 35 | The Greatest Showdown on Earth | 1974-06-25 | 25 min |
| Directing | Yoshiyuki Tomino | Director |
| Directing | Yuji Nunokawa | Director |
| Writing | Akiyoshi Sakai | Screenplay |
| Writing | Hiroshi Sasagawa | Screenplay |
| Directing | Takao Koyama | Director |
| Writing | Naoko Miyake | Screenplay |
| Sound | Shunsuke Kikuchi | Music |
