I remembered another man playing Poirot, not Albert Finney who was Poirot for "Orient Express" movie. It was Peter Ustinov and here's part of the article that I just read.
'EMI returned to Poirot in a theatrical release of Death on the Nile in 1978, based on the novel of the same name and starring this time Peter Ustinov as Poirot. The movie was actually filmed in Egypt under horrendous temperatures, and the poor crew had no hotel reservations. The cast was an all-star one also, with: Bette Davis, David Niven, Mia Farrow, Angela Lansbury, and Jack Warden. The movie poster (painted by Richard Amsel who did the "Raiders of the Lost Ark" poster) featured an Egyptian King holding a knife in one hand and a revolver in the other.
Peter Ustinov returned as Poirot in another production, this time by Universal of Evil Under the Sun, premiering in 1982. The movie also starred Diana Rigg, James Mason, and Roddy McDowall. The director of the movie was Guy Hamilton, also director of Bond movies like "Goldfinger", "Diamonds Are Forever", and "Live and Let Die". Another theatrical release of a Poirot movie came in 1988, starring Ustinov again as Poirot. This was Appointment With Death, this time an EMI production, also starring Carrie Fisher and Lauren Bacall.
Ustinov wasn't done, however, with portraying the Belgian detective. He appeared as Poirot in three made-for-television movies: Thirteen at Dinner (1985), Dead Man's Folly (1986), and Murder in Three Acts (1986). The first of these was based on Lord Edgware Dies and was made by Warner Brothers. It also starred Faye Dunaway and David Suchet as Inspector Japp, just before he himself played the famous detective. (Interesting note is that Suchet once said that playing Japp was "possibly the worst performance of my career.") The next TV movie of Ustinov's was Dead Man's Folly, again by Warner Bros. and shown in 1986. The role of Ariadne Oliver the novelist was portrayed by Jean Stapleton; Tim Piggot-Smith also starred. The last of the Ustinov movies was Murder in Three Acts in 1986 (based on Three-Act Tragedy). It starred Jonathan Cecil and Tony Curtis. Instead of the setting being in England, it was changed to Acapulco.
Before the current actor doing Poirot is discussed, another made-for-TV movie was shown on CBS in April 2001, starring the English actor Alfred Molina as Poirot in Murder on the Orient Express. He's the Poirot of the 21st Century, using his gray cells of the brain with modern technology. (Would Poirot really use a laptop computer? No, I don't think so.) For what Molina's given here, and a tough act to follow, Molina does a fair job of doing Poirot. However, the script is the main fault here, with Poirot getting a love interest, with the changes of characters and the way Poirot goes about his investigations. Of all of the Poirot stories to adapt, why was this one picked? It's nearly impossible to do a "new version" after the Albert Finney film: it was near perfection because it was so faithful to the novel. This TV movie received bad reviews from historians, fans, and critics alike. Although I like Molina as an actor, this movie really stunk."