That Thing on ABC (1978) Online
| Credited cast: | |||
 | Bill Bixby | - | Himself |
 | Judy Carter | - | Performer |
| Denny Evans | - | Performer |
 | Cheryl Ladd | - | Herself |
 | Shelley Long | - | Performer |
 | Andrea Martin | - | Performer |
 | Mandy Patinkin | - | Performer |
| William Porter | - | Performer (as Will Porter) |
 | John Ritter | ||
| John Cameron Swayze | - | Himself |
| Paul Tracey | ||
 | Marsha Warfield | - | Performer |
 | Henny Youngman | - | Himself |
| Deborah Zon |
Marsha Warfield's TV debut.
Shelley Long's TV debut.
Mandy Patinkin's TV debut.