|First Appearance:||The Slump|
|No. of Episodes:||1|
|Portrayed by:||Scott Michael Morgan|
Jake believes he has found Judd's missing grandmother, but it turns out that Ethel Musterberg is a senile woman from the Prospect Heights Senior Center. Jake later discovers that the couple had made similar missing persons reports in 5 different states. He suspects that they're committing insurance fraud.