Complex sentence: Tahir is perhaps the most important member of the secret service.He know that Imran is X- 2 and in Imran's absence he plays the role of X- 2 to the rest of the secret service members.
Split into simpler sentences: Tahir is perhaps the most important member of the Secret Service. He knows that Imran is X- 2 and in Imran's absence he plays the role of X- 2 to the rest of the Secret Service members.