The last part of “Frontier in Space” is one of the very few occasions in Doctor Who where major villains team up. The Master and the Daleks only get a few minutes together, and the neatness is overshadowed by knowing this was Roger Delgado’s final appearance in the series.
Delgado had told Who‘s producer that he was ready to move on. He and his agent had heard that the reason he wasn’t getting as many offers in 1971-72 as he might was that all the casting people assumed that he was a regular in Doctor Who and wouldn’t be available. So Barry Letts was beginning to put together ideas for a big finale for the character, which is why he doesn’t get anything like a sendoff this time. He just vanishes in the confusion of the Ogrons running around.
“Frontier” was made in September of 1972. Not too long after, Delgado flew to the south of France to shoot an episode of ITC’s fun little Mission: Impossible clone, The Zoo Gang, which would be shown in 1974. It would be his last English language performance. In June 1973, he flew to Turkey to appear in a small part in a French TV miniseries, La Cloche Tibetaine. On the 18th, while being driven to a location shoot, he was killed in a car crash along with two other men.
Our favorite six year-old critic hadn’t been enjoying this serial very much, but he perked up so much when the Daleks arrived that I genuinely felt bad telling him why this was Delgado’s final appearance as the Master. He listened to my story, a little glum, before saying “He was a great actor, because he played real bad at making the Master SO BAD!” That’s possibly not the most eloquent way to put it, but I agree with the sentiment. He certainly was a terrific, wonderful actor. It’s always a pleasure to watch an adventure show or ITC series from the late sixties or early seventies and find him in the cast. He never had all the major roles that he deserved, but every one of his appearances is worth tracking down.