Doctor Who: the companions' best and worst performances

In an essay in the summer of 2018, I looked at the actors who've played the title role in Doctor Who, and judged their best and worst performances. I thought I'd do the same for the companions. Doctor Who has, by and large, been blessed with such extraordinary actors as companions that it's easy to take their work for granted -- to presume their performances are uniformly strong. But actors, like the rest of us, have good days and bad days, and in the case of Doctor Who, there are all kinds of factors that can contribute to the quality of a performance -- just as there are all kinds of criteria I have for judging them. A few words in advance. I'm only considering companions who stuck around for more than two full-length stories, and I’m not including the threesome traveling with the current Doctor, as they’re only partway through their journey. And just to mix it up, I'm listing the companions alphabetically — so get ready to bounce around the decades. (As in my essay about the Doctors, I've bolded the stories that contain the companions’ best and worst work, but I vary the order in which I present them. Sometimes, I list the good before the bad, sometimes vice versa; if you only look at the titles bolded, you might be surprised, when you read the text, to discover which is which.)

Doctor Who: in defense of "Attack of the Cybermen"

The sixth of seven neglected or maligned Classic Who serials that I consider worth revisiting, one for each Doctor. The series commences here, with "Terminus," then continues with "The Ark," "Delta and the Bannermen," "Death to the Daleks" and "The Wheel in Space."

Instead of beginning this essay by launching into reasons "Why I Like Attack of the Cybermen," let's indulge in a bit of fan fiction. Recall, if you will, the end of the Fifth Doctor's final serial, "The Caves of Androzani." Having obtained enough serum to counteract the poison that's killing his new companion Peri (and himself), the Doctor tracks her down at Sharaz Jek's lair and carries her back to the TARDIS, where he administers the cure. But he's committed the ultimate sacrifice, as there's not enough left for himself -- and as memories of his former companions and his oldest enemy swirl around in his brain, he expires and regenerates, and in his place, the next Doctor, Colin Baker, rises to announce "change, and not a moment too soon."