31: Wilfred Mott (Bernard Cribbins)
He might have played Tom Campbell in a certain Peter Cushing movie but to a lot of us, Bernard Cribbins is Wilfred Mott. Not just the man who was the grandfather of Donna Noble but also the last companion of the Tenth Doctor and easily the best thing about The End Of Time. Wilfred Mott, we salute you and your wonderful family. Even Sylvia too.
32: Liz Shaw (Caroline John)
There's a lot of things about Spearhead From Space I am thankful for. The arrival of the Third Doctor, the Autons, both the Brigadier and Benton becoming regulars on the show, the show itself moving into colour but one thing I am most thankful for is the excellent Liz Shaw. I've never believed that intellectual companions don't work on the show because while Liz may have only lasted a season, she was bloody fantastic from start to finish. Much respect to the lovely Miss Shaw, folks.
33: Peri Brown (Nicola Bryant)
Long before the days of Amy Pond, one of the most lusted after companions was probably a certain American botanist but let's be honest here - Peri was more than that. She could stand up for herself with the Sixth Doctor (though she debuted with his predecessor) and outside of Adric, she's probably had one of the most interesting departures from the show. Whether you believe she was killed to store Lord Kiv's mind or became Yrcanos's wife, Peri left during the show's most polarising of times.
34: Nyssa of Traken (Sarah Sutton)
Oh Nyssa - it's always the quiet ones, isn't it? When you have the more vocal of companions with Tegan and pompous at times with Adric, the Fifth Doctor was probably glad to have the more calmer Nyssa on board as well. Also like Liz and Romana, Nyssa was another clever companion who worked quite nicely in the two seasons of the series she was on.
35: Vicki Pallister (Maureen O'Brien)
Vicki - what can I say? In some ways, it felt like she was brought in as a surrogate Susan for the First Doctor but saying that is being rather dismissive of the character to be honest. She was a brilliant companion with the First Doctor, even better when Steven Taylor was added into the mix as well. Another underrated traveller in the TARDIS.
Parts 5 and 6 will be up next week.