Clash of the Titans/Trivia

The 1981 film

 * Maggie Smith as Thetis, Burgess Meredith as Ammon, the original Bond Girl as Aphrodite (which doubled as a Parental Bonus when the movie was new), and, most of all, Laurence Olivier as Zeus -- there's a reason Last Action Hero referred to him in this role.

The remake:

 * Hey It's That Guy:
 * Solon, one of the Argos soldiers with the most lines and screentime is played by veteran Irish character actor Liam Cunningham who has been in a billion movies but is probably most familiar from The Wind That Shakes the Barley and Perriers Bounty.
 * And now he's Davos Seaworth.
 * Lord Voldemort is trying to get revenge on his brother Ra's al Ghul.
 * Liam Neeson clearly loves playing those "grandiose deity" characters; he also famously voiced a certain personification of God elsewhere. And for all of this, we love him.
 * The only thing standing in his way? Jake Sully.
 * Liam Neeson and Ralph Fiennes have fought before.
 * Draco was Le Chiffre and Io is Agent Fields.
 * Perseus' adoptive father was Roland Tembo. Who was in... so many movies he deserves his own trope (along with Danny Trejo) for being the Hey It's That Guy in so many movies.
 * Mr Hyde plays Acrisius/Calibos, more or less in the same manner and with a lot of the same vocal cues. And Dr Bashir plays Hermes.
 * Effy is Andromeda's...handmaiden? Sister? It's not clear. In any case, she only gets one line.
 * Tony has a rather larger role as one of Perseus' team.
 * Juno Eclipse is Artemis.
 * Apollo has later become Zeus.
 * Andromeda is Miranda Frost