Simplify the following text for a Grade 6 native English-speaking person.
Original: In 1981 , she was offered the role again to ease the transition between the Fourth and Fifth Doctors , which she declined , but agreed to star in the pilot ( and only episode ) for the spin-off series K-9 and Company , which brought her together with K-9 , another popular character .
Simplified: She also agreed to star in one episode of a spin-off series K-9 and Company .