An origin story for HAL, as well as HAL's "job interview" to become the Discovery's computer, and an origin story for HAL's twin ... with whom a strange sibling rivalry develops.

A teleplay, like watching a Murdoch Mysteries episode. A murder occurs in a public park. Crabtree is first on the scene, and he comes to think that he handled his duties badly. Meanwhile, there is confusion about what actually happened: two suspects both admit they had means and motive and opportunity, but deny their guilt. It's up to Murdoch to sort it all out. Solution included.