Top of the Pops Episode dated 21 April 1977 (1964–2018) Online
- Original Title :
- Episode dated 21 April 1977
- Genre :
- TV Episode / Music
- Year :
- 1964–2018
- Directror :
- Stanley Appel
- Cast :
- Tony Blackburn,Eddie and the Hot Rods,O.C. Smith
- Type :
- TV Episode
- Time :
- 40min
- Rating :
- 6.4/10
| Episode cast overview, first billed only: | |||
 | Tony Blackburn | - | Himself - Presenter |
| Eddie and the Hot Rods | - | Themselves |
| O.C. Smith | - | Himself |
| Legs & Co | - | Themselves |
| Berni Flint | - | Himself |
| Tavares | - | Themselves (archive footage) |
| Lynsey de Paul | - | Herself |
| Mike Moran | - | Himself |
 | Leo Sayer | - | Himself (archive footage) |
| Delegation | - | Themselves |
| Elkie Brooks | - | Herself (archive footage) |
| David Dundas | - | Himself |
| The Dead End Kids | - | Themselves (archive footage) |
| Deniece Williams | - | Herself |
 | ABBA | - | Themselves (archive footage) |