hd.thomson-multimediaThe Hardy Boys/Nancy Drew Mysteries The Disappearing Floor (1977–1979) watch online HD
- Original title:The Disappearing Floor
- Category:TV Episode / Family / Mystery
- Released:1977–1979
- Director:Fernando Lamas
- Actors:Shaun Cassidy,Parker Stevenson,Pamela Sue Martin
- Writer:Larry Alexander,Glen A. Larson
- Duration:1h
- Video type:TV Episode
- Rating 6.4
- Votes 561
Related videos:
Short summary
While investigating the disappearance of a missing scientist, the boys begin to doubt their senses when they discover an isolated estate loaded with bizarre illusions.
| Episode cast overview, first billed only: | |||
 | Shaun Cassidy | - | Joe Hardy |
 | Parker Stevenson | - | Frank Hardy |
 | Pamela Sue Martin | - | Nancy Drew (credit only) |
 | Lisa Eilbacher | - | Callie Shaw |
 | Ed Gilbert | - | Fenton Hardy (as Edmund Gilbert) |
 | Edith Atwater | - | Aunt Gertrude |
 | Marj Dusay | - | Dr. Janice Craddock |
| Robin Chesler | - | Marcia Collins |
 | Howard Platt | - | Sidney Tabor |
 | David Opatoshu | - | Professor Desmond |
 | Sam Gilman | - | Mr. Hodges |
| Alex Rodine | - | Russian Attaché |
 | Henry G. Sanders | - | Guard (as Henry Gayle Sanders) |
| Jack Schultz | - | Lt. Oates |
| Michael A. Salcido | - | Technician (as Michael Salcido) |