The documentary serves as a tribute to National Artist for Cinema Gerardo de Leon in celebration of his Centennial Year. “Salamat sa Alaala.” is inspired by the music composed by the late film director when he was a teenager playing background music for silent movies in Manila theatres. The video opens up with a capsulated history of the birth of the Filipino movies followed by a series of shots of veteran actresses, the academe and the young generation of filmmakers affirming his unique qualities as a world-class film figure. Then we unravel his private life as a family man. The documentary is one way of thanking him for his lasting legacy in the art form he left behind.
| Actor | Role |
|---|---|
 Anita LindaHerself | Herself |
 Nick DeocampoHimself | Himself |
 Gloria SevillaHerself | Herself |
 Lilia DizonHerself | Herself |
 Robert ArevaloHimself | Himself |
 Barbara PerezHerself | Herself |
 Raymond RedHimself | Himself |
 Clodualdo del Mundo Jr.Himself | Himself |
| LLeonor IlaganHimself | Himself |
| LLuis NepumocenoHimself | Himself |
| JJoey RomeroHimself | Himself |
| LLiberty IlaganHerself | Herself |
| MMaria Fe Ilagan GibbsHerself | Herself |
 Ronaldo ValdezHimself | Himself |
 Janno GibbsHimself | Himself |
 Leopoldo SalcedoSelf (archive footage) | Self (archive footage) |
 Fernando PoeSelf (archive footage) | Self (archive footage) |
 Joseph EstradaHimself | Himself |
 Jock MahoneySelf (archive footage) | Self (archive footage) |
 Fernando Poe Jr.Self (archive footage) | Self (archive footage) |
 Cecilia LopezSelf (archive footage) | Self (archive footage) |
 Gloria RomeroSelf | Self |
| NNicanor TiongsonHimself | Himself |
 Tony CarreonHimself | Himself |
| RRose Marie GilHerself | Herself |
 Susan RocesHerself | Herself |
| JJet Del MundoHimself | Himself |
| LLeni AlanoHerself | Herself |
 Eddie GarciaHimself | Himself |
 Christopher de LeonHimself | Himself |