Agatha All Along is hiding secret references to Elizabeth Olsen and Stan Lee in one blink-and-you'll-miss-it moment

Agatha All Along is clearly taking the WandaVision approach to Easter eggs, scattering a trail of breadcrumbs throughout each episode that nod and wink towards Marvel (and MCU) history. One of the most beguiling, however, involves the dates on the library card that 'Agnes' finds during her sleuthing mission...