[on his on- and off-screen chemistry with
Jonathan Harris, who played Dr. Zachary Smith]: You know, for Jonathan, it was gruelling days, because he was in just about every scene, he had a lot of weight to pull on the show, he had a lot of lines to learn and he worked with them creatively. He made up lines, he re-wrote lines for himself and he worked very hard. Plus, he took time in the make up chair, it wasn't just thrown on, he cared about that, he cared about every aspect of Lost in Space, because he is the consummate professional. We all were professionals, we all had a great background before doing Lost In Space, but Jonathan had done a lot of theatrical work, television work and movies. He worked very hard on the set.