|Portrayed by||S.E. Perry|
|First appearance||Mystery Date|
|Final appearance||Mystery Date|
|Other Relations|| Joan Holloway (Daughter-in-law)|
Kevin Harris (Grandson)
Joe Harris is the father of Greg Harris. He made his only appearance in the Season 5 episode, "Mystery Date". It was revealed that he served time in the army in the same episode. Joan Holloway's mother Gail Holloway attempted to negotiate with him to write. Letter to his congressmen in an attempt to lure Greg out of returning back to service, beknownist to both Joan and Gail at the time, that Greg had volunteered to go back.
- In the episode "Mystery Date" Joe did not have any lines.