Although regulars are not credited when they do not appear, cast changes are only noticed when a character is killed or noticeably written out, like Niki, Monica and Micah after Powerless.
Main Cast[]
Genesis to Collision - Original Cast - 10[]
| Claire | Hiro | Isaac | Matt | Micah | Mohinder | Nathan | Niki | Peter | Simone |
Hiros to Six Months Ago - D.L. added to cast - 11[]
| Claire | D.L. | Hiro | Isaac | Matt | Micah | Mohinder | Nathan | Niki | Peter | Simone |
Fallout to Parasite - Noah added to cast - 12[]
| Claire | D.L. | Hiro | Isaac | Matt | Micah | Mohinder | Nathan | Niki | Noah | Peter | Simone |
.07% - Simone removed - 11[]
| Claire | D.L. | Hiro | Isaac | Matt | Micah | Mohinder | Nathan | Niki | Noah | Peter | Simone |
Five Years Gone to How to Stop an Exploding Man - Isaac removed - 10[]
| Claire | D.L. | Hiro | Isaac | Matt | Micah | Mohinder | Nathan | Niki | Noah | Peter |
Four Months Later... - D.L. removed, Ando and Maya added - 11[]
| Ando | Claire | D.L. | Hiro | Matt | Maya | Micah | Mohinder | Nathan | Niki | Noah | Peter |
Lizards - Adam added - 12[]
| Adam | Ando | Claire | Hiro | Matt | Maya | Micah | Mohinder | Nathan | Niki | Noah | Peter |
Kindred - Sylar added - 13[]
| Adam | Ando | Claire | Hiro | Matt | Maya | Micah | Mohinder | Nathan | Niki | Noah | Peter | Sylar |
The Kindness of Strangers - Monica added - 14[]
| Adam | Ando | Claire | Hiro | Matt | Maya | Micah | Mohinder | Monica | Nathan | Niki | Noah | Peter | Sylar |
Fight or Flight to Powerless - Elle added - 15[]
| Adam | Ando | Claire | Elle | Hiro | Matt | Maya | Micah | Mohinder | Monica | Nathan | Niki | Noah | Peter | Sylar |
The Second Coming to The Eclipse, Part 2 - Adam, Elle, Micah, Monica, and Niki removed, Angela and Tracy added - 12[]
| Adam | Ando | Angela | Claire | Elle | Hiro | Matt | Maya | Micah | Mohinder | Monica | Nathan | Niki | Noah | Peter | Sylar | Tracy |
Our Father to Strange Attractors - Maya removed - 11[]
| Ando | Angela | Claire | Hiro | Matt | Maya | Mohinder | Nathan | Noah | Peter | Sylar | Tracy |
Once Upon a Time in Texas to The Fifth Stage - Samuel added - 12[]
| Ando | Angela | Claire | Hiro | Matt | Mohinder | Nathan | Noah | Peter | Samuel | Sylar | Tracy |
Upon This Rock to ... - Nathan removed - 11[]
| Ando | Angela | Claire | Hiro | Matt | Mohinder | Nathan | Noah | Peter | Samuel | Sylar |