When Mrs. Stigson lays an egg there is great rejoicing - Darwin has always wanted a baby brother or sister to play with. But after leaving it in the care of mad Uncle Loops, Mrs. Stigson is certain that something is different. This is not her egg! But whose egg is it, and what has happened? And how will Darwin ever get the right one back from gangster T. Rex, Flint Beastwood? Download and start listening now!