Two years after retiring and becoming chairman emeritus of Infosys, N. R. Narayana Murthy made the decision to come back as executive chairman in June, intent on restoring the $7.3 billion (revenues) company to its old glory. Son Rohan, who has a Ph.D. in computer science from Harvard, came along to help. The move to appoint him as vice president drew criticism and led to exodus of top executives. Neither is being paid.