Simplify the following text for a Grade 6 native English-speaking person.
Original: The show became enormously successful and Boreanaz starred in a spin-off series , Angel , which gave the character a chance to evolve and concentrated on Angel 's battle for redemption for the sins he committed before he regained his soul .
Simplified: The series became very successful and Boreanaz starred in a spin-off series , Angel . This new series gave the character a chance to evolve .