Mohinder's subconsious quest to step out from his father's shadow has taken him halfway around the world. After finding nothing in his father's local apartment except someone in another room making a mysterious phone call which leads him to believe his father was actually killed to cover up his knowledge of peculiar genetic events that have been taking place throughout the globe. So obsessed is he that he leavs behind a successful teaching career in India, and journied to New York City to get to the root cause of his father's death which in turn led to him taking up his father's work to the point of actually moving into his late father's apartment building and taking his job as a cabdriver as he sought clues behind his father's work and his real death. It wasn't until a chance encounter with Peter Petrelli, then Noah Bennett as consecutive fares then finding an operative posing as an exterminator and driving him off with the help of the young woman living across the hall, Eden Cain, who then helped him find his father's research contained on a USB drive hiddden in his lizard's cage, he began in earnest in researching the anomalies surrounding his father's life and death.
During the course of his research, he learns that his father had a falling out with someone named Sylar. Believing him to be patient zero, the first one to display abilities, he tries to track down the man. However, the more he tries, the more it would seem that Chandra Suresh wanted nothing to do with the man after a certain point. Growing frustrated, Mohinder threw his father's laptop to the ground and in the process discovered a secret compartment that contained a book listing all of those in the world showing anomalistic abilities, and a single key. The only address the book contained was that belonging to Sylar's. So they ventured over to the apartment only to find that they key didn't work. Getting in with a screwdriver, they discovered a rather spartan apartment. However, they also discovered a small room with maps and figures identical to his father's as well as scrawlings on the wall of "I'M SORRY" and "I HAVE SINNED". They call the police, and when they return with them it has been entirely cleaned out and none of their claims could be substantiated.
He then sought out Nathan Petrelli, whom he believed through his father's work to be one those people with abilities. Petrelli can't have anything to do with Suresh because of his congressional campaign but does tell his bother Peter about it. Putting it all together, Peter finds Mohinder but because he can't demonstrate any abilities without being in the presence of someone who can they seek out someone who not only has abilities but can prove both of them right — Isaac Mendez. However, when they arrive Isaac is strung out on drugs and refuses to let the men in. Disappointed, they take the subway back, and while doing so Hiro freezes time on the train so he can speak to Peter. When time resumes, Peter tries to tell Mohinder what happened but the damage has been done: Thinking Peter crazy, and rebuking any attempts to bring him around, he dismisses the whole course he's been on for naught, and he returns to his fathers apartment to begin backing. He is returning to Madras. Eden tries to convince him to stay by flirting with him and going so far as to kiss him, but his mind is made up despite Eden's confidence that he'll return.
While back in India, Mohinder scatters his father's ashes and takes some time to debate returning to the classroom. His former girlfriend Mira invites him to work for the company she works for, under the condition that he is silent about his father's work. While contemplating this Mohinder speaks to his mother about his father's ill fated trip to the US, and learns that his sister had abilities as well. It was during this time he began having some prophetic dreams involving a little boy with a soccer ball that led him through parts of his life that were key. While in his father's office, Mohinder found the boy's picture on a folder. Searching the streets, he eventually finds the boy and speaks to him and finds out that people visit him in their dreams and not the other way around. Once again returning to his father's office, and fairly certain on how to access the computer that had vexed him there, he figured out the password was his sister's name. On the computer was all the names of all the people his father knew to have special abilities. Feeling his path had been once again set before him he told his mother his intention to return to New York and find these people to inform them of their abilities.
When he returns to the US, he also decides to inform these people about Sylar. He recieved a cryptic phone call from Eden, which ended abruptly. Unable to find her, he continues about his work until his contacted by the police who are looking for someone named Sarah Ellis. The name is on his list, and informs the cops that he had attempted to contact her without success, but it isn't until he sees her picture that he recognizes her: Eden McCain. Giving the authorities her alias, they inform him that she had been found after committing suicide at Lake Ramsay.
Soon after, Mohinder is confronted by Noah Bennett at his apartment. He asks Noah about Eden and he tells Mohinder that she really was a good person, and wants Mohinder's help in finding others with special abilities so that this wouldn't happen again. Mohinder refuses and after an exchange in which Noah asks him if Mohinder's on the list and he responds with with silence. Exiting, Noah leaves his card even while Mohinder protests that he isn't interested in working with him.
Nathan finally approaches Mohinder, who apologizes for acting like a lunatic when they first met. They begin talking, and Nathan reveals that he's actually there for Peter. He explains that Peter is afraid that he is the one that'll cause the explosion that'll devastate NYC. Mohinder explains how Peter's own ability works, and also goes on to say that he could help Peter if he could test him. However, Nathan is reluctant to let Mohinder near him. because he doesn't want Mohinder to fuel Pete's paranoia. Nathan is talked into the idea, and when they arrive at Peter's apartment, Peter doesn't want to go - he refuses to be a guinea pig. He does pretend to go along with it though, until Claude shows up and helps him escape. Unfortunately, all the work Mohinder had been doing up until this point was a bust. None of those on the list that he'd contacted so far had believed him. That is, until one of those on the list contacted him: Zane Taylor. He went to meet Zane, unaware that it was actually Sylar, who had killed Zane and taken over his identity. He teamed up with the unsuspecting geneticist, claiming he could help his work.
However, Mohinder doesn't have several degrees and letters after his name because he's stupid. He's been on to Zane/Sylar for quite a while and when they return to Mohinder's apartment Mohinder drugs him. He straps Sylar to a chair and connects an IV drip of curare to him, which inhibits Sylar's powers. Keeping Sylar alive just long enough to complete the research, Mohinder actually overcomes his morals and shoots Sylar in the head - except with one problem: The bullet was stopped by Sylar's telekenesis. Breaking free of his bonds he informs Mohinder that he'd actually stopped the IV several minutes ago but in his arrogance and researched had failed to check it. Acting on his M.O. Sylar pins Mohinder on the cieling and waits. When Peter arrives, Mohinder has just enough consciousness to inform him that Sylar is there…just before Peter is attacked by Sylar. During the fight, Peter is killed by Sylar. It is Mohinder that takes him to Nathan's home where Clare Bennet is, and uses her powers to help Peter heal himself through his own unique ability.
The Company managed to locate Mohinder shortly before the nuclear event that leveled NYC. Offering to keep him safe, and allowing him to continue "to do the good work he was begun" relatively unabated "We might ask you to work on just a few side projects here and there - you'll hardly know we're around" was an offer he just couldn't refuse. When it was safe to travel once again, they allowed him to return to India while also working for them. Things remained quiet until 2007. In the wake of Nathan revealing the existance of the Evolved, a shaky and unlikely alliance developed between The Company and the Department of Homeland Security. The task given unto them is to be able to develop a fast, viable test to detect Evolved and that task is singularly given to Mohinder who has been spending quite alot of time in developing it and ensuring that it is both fast /and/ accurate. The trials completed and the test ready to roll out, he has been requested to return to the US - and not just for the tests, either. It seems that there have been cases of evolved indivuduals going on literal rampages with their powers - sometimes harmless but in other cases quite violent - and at the end they collapse in bloody and dead heaps. Being the most qualified individual to explain this, Dr. Suresh returns to the United States so that he can be closer to the cases and quickly respond should any more arise.