Spending time with grandchildren is the best phase: Bachchan

"Somebody who not only has power, strength of a superhero, but he has to have the mind of somebody who is wise. In real life there is always an elder who gives advice," he said, without divulging much about his role. "Astra Force", a funny and fast paced action-adventure series, which will go on air in early 2017 on Disney Channel India.