Come on a journey with us… into the immunoverse! Inside our immune system we have a whole host of characters: from assassins to superheroes, hipsters to butlers. Kate and Matt are joined once more by singing scientist Catriona Nguyen-Robertson. Cat is an immunologist who tells us about some of the cool immune cells she studies, and the role they play in our internal immunoverse.Kate also answers a listener question about snakes… do they have necks?!If you loved what Catriona had to say you can find her on twitter (https://twitter.com/CatrionaNR), Instagram (https://www.instagram.com/nyuroscientist/), and YouTube (https://www.youtube.com/channel/UC_NtXSj9jH06SHNmsKhyfuQ). As always, you can follow Curiosity Killed the Rat on twitter (https://twitter.com/CuriosityRat), Insta (https://www.instagram.com/curiosityrat/), and Facebook (https://www.facebook.com/curiosityrat/), and email in your listener questions to [email protected] question references:https://www.sciencedaily.com/releases/2008/06/080618152400.htmhttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0219661https://onlinelibrary.wiley.com/doi/abs/10.1002/jmor.20037