The episode serves as a meditation on mortality and the inevitable passage of time.
: After receiving a terminal diagnosis from his doctor, Russ begins to put his affairs in order, including handing leadership of the Loop over to Loretta (Rebecca Hall). Cole, unable to accept his grandfather's impending death, attempts to use the technology of the Loop to "save" him, but eventually must face the reality of loss. "Tales from the Loop" Echo Sphere(2020)
: Russ takes Cole to a massive, rusting hollow sphere in a field marked "N-770". When a person shouts into it, the number of echoes they hear indicates how much longer they will live. Cole hears six echoes, suggesting a long life ahead, while Russ hears none—confirming he has very little time left. The episode serves as a meditation on mortality
