When Heather asks Santa to patch up the rift between her mother and grandparents, Fonzie decides to make her wish come true. Meanwhile, K. C.'s parents visit for Christmas, and a rivalry between Howard and his brother reignites.
| Name | Type | Role | |
|---|---|---|---|
| Pamela Ryan | Writer | ||
| Beverly Bloomberg | Writer | ||
| Sue Ann Langdon | Guest Star | ||
| Richard Paul | Guest Star | ||
| Jerry Paris | Director |