Before I Forget
Asesino del olvido (original)
Pascual León, a retired 65-year-old man, finds out how to give meaning to his last days after being diagnosed with Alzheimer's: to avenge a past crime before his memory loss erases everything that he is.
Starring Damián Alcázar, Paulina Gaitán, Erik Hayser
It's a crime and drama show, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of show.
Watch it here
Not found streaming from Singapore.