The Sendable protocol is actually a super-simple protocol that let's us tell the compiler whether or not an object is safe to send into an asynchronous context. For our purposes, this will mean whether or not we can safely send an object into an Actor! Next video: https://www.youtube.com/watch?v=ePPm2ftSVqw Previous video: https://www.youtube.com/watch?v=BRBhMrJj5f4