| John Showalter | |
|---|---|
| Occupation | Director, editor and producer |
| Years active | 1981–present |
John F. Showalter is an American television director and editor. Some of directing credits include Ghost Whisperer, House, Criminal Minds, Without a Trace and Supernatural, The Mentalist as well as editing episodes of Lois & Clark: The New Adventures of Superman, Gideon's Crossing and Glory Days.[1]