Lloyd and Abacus' friendship is tested when they find a chrysalis and can't agree on what to do with it - they think they have the answer when the chrysalis starts communicating with a series of knocks, but is it one knock for 'yes' or one knock for 'no'?

When Bob's best friend Gummy goes missing, Lloyd and Abacus take on the task of finding him... which is only right as they were the ones who lost him. Lloyd suspects foul play, so he compiles a list of suspects and starts following the clues.

Lloyd always has Abacus over for dinner, so PB persuades Malcolm and Gena to let her invite Julie the Spider for dinner too. However, Lloyd's not convinced by Julie's promise not to eat them... and he decides to take precautions to ensure that his family don't become dinner!