Complex sentence: The first three seasons aired only on Saturdays'at 10pm IST, the season 4 was then aired on Fridays' and Saturdays' at 11 pm IST wich ended in June 26th 2010.
Split into simpler sentences: The first three seasons aired only on Saturdays'at 10pm IST. The season 4 was then aired on Fridays' and Saturdays' at 11 pm IST wich ended in June 26th 2010.