Max Adrian?

Does anyone know why Max Adrian was replaced as Ludicrus Sextus after the first series?

In my opinion, he really made the role!


"The Opener of the Way is Waiting"


i haven't been able to find anything on that, but i agree max adrian was great. Funny thing, i always thought Wallis eaton looked older, but on looking them up, i find that max Adrian was actually 14 years older than Wallis eaton.