She did quite a lot of TV work. I saw her in an episode of "Jonathan Creek" not long ago.
Way back when, a young lady asked me "Who is your favorite Companion?" I could tell it was a test and that the correct answer would be "Leela", but I didn't want to pick, so I said:
"Sarah Jane was the quintessential companion; didn't she do it longer than anyone else? Leela was the most exciting because she was a jungle girl. The first Romana (Mary Tamm) was the most glamorous. The second Romana was interesting because she was Mrs Tom Baker for a while. And I have a soft spot for Jo Grant: you may think her dim, but she had a good heart and her instincts were always correct."
I'm fuzzy on Companions before and after the Tom Baker years, although Grant was with Pertwee.