This news is a little stale, but worth posting just the same.
A year ago we lost classic Doctor Who
actress Liz Sladen and now Caroline John has passed.
Caroline was known by old school Whovians as Liz Shaw. The first companion for 3rd Doctor Jon Pertwee.Jon Pertwee as the 3rd Doctor & Caroline John as Liz Shaw
Unlike many of the preceding female companions of the Doctor, Liz Shaw was a scientist and understood much of the Doctor's technobabble. This was perhaps the downfall of the character; Liz and the Doctor discussed things on an equal level of intelligence, and the Doctor respected and rarely patronised her. As the essential role of the companion in Doctor Who
is to ask a lot of questions which the viewers might be asking themselves, incoming producer Barry Letts considered her character was unsuitable and decided against renewing her contract.