My introduction to the Runaways was some network special that Joan Jett took part in. There might have been another Runaway in the mix, but I only remember Joan being there. It was something like the Battle of the Network Stars, but since she wasn't any kind of star at that point, I don't know.
That was pretty much the last time I heard of her until 1981's "I Love Rock and Roll" which I love to this day, but it made me go look for her earlier albums from the Runaways. This song is from their last LP which is think is called "And now... The Runaways". You can see their final bass player, Michael Steele in this video. She later had more success with the Bangles.