Ivanhoe was an indolent ginger tomcat who was the family pet of Sam Tyler and his family in the early 1970s. According to Ruth Tyler, he was very affectionate towards herself and young Sammy. In 1973, the adult Tyler encountered Ivanhoe sitting outside his childhood home before he met his mother. The cat even recognised Tyler and showed affection as he did to his younger self (LOM Series 1: Episode 4). His name was presumably inspired by the eponymous hero of the novel "Ivanhoe" by Sir Walter Scott.