- Award Snub: Despite the film being notable for its stop-motion special effects, the picture was not Oscar nominated for either Make-up or Visual Effects.
- Awesome Music: The whole score.
- Base-Breaking Character:
- Calibos. Some like him as a villain and think he's got a good design. Others feel as if a romantic rival for Andromeda wasn't needed, which completely ignores the existence of Phineus from the original story.
- Likewise Bubo. He's listed under The Scrappy below but it's a fact that the heroes would often be screwed without him, and many fans enjoy the little clockwork critter for his cute factor.
- Designated Villain: Medusa has never done anything wrong in her entire life, and just wants to be left alone in a place no one could find her. That doesn't stop people from all over the world apparently hunting her down and trying to kill her to get her head, even though they have to enter the Underworld to do it.
- Ham and Cheese: Burgess Meredith as Ammon. A reviewer even said he acts as if he's in a Mel Brooks movie. Partially justified, as Ammon is a theater actor. Theatricality is expected of him.
- Hilarious in Hindsight:
- An episode of Downton Abbey has Lady Mary telling the story of Perseus and Andromeda, to the surprise of her grandmother the Dowager Countess Violet. Violet is played by... Maggie Smith. What's more is that Violet expresses shock at the fact that Andromeda was chained naked to the rock — and in this movie Andromeda gets Adaptational Modesty, wearing a dress during the sacrifice.
- The fight scenes against the Titans becomes even more amusing when you find out about Attack on Titan. Heck, it even has an arc of the same name.
- Memetic Mutation: Release the Kraken!
- Narm Charm: The film runs on it.
- One-Scene Wonder: Medusa has just eight minutes of screen time, yet (after the Kraken) she's the thing most people remember the movie for. It's been pointed out that most millennials owe their knowledge of Medusa in general to this film. Likewise she appeared far more in popular culture after the film was made.
- The Scrappy: Bubo the tin owl, who most people think exists purely to appeal to kids. Though he actually does the most heroic deeds aside from Perseus. Such as helping fend off cannibalistic Witches, going alone to free Pegasus from Calibos's men, going on ahead of Perseus to distract the Kraken long enough for he and Pegasus to arrive with Medusa's head — and lastly, retrieving said head after Perseus nearly loses it in the ocean.
- So Bad, It's Good: It's generally considered to be quite cheesy and with some dated effects. However it does have a nostalgic glee for those who grew up with it. The fact that it has the likes of Maggie Smith, Ursula Andress and Laurence Olivier as the Gods helps too.
- Special Effect Failure: The stop-motion is mostly effective. The bluescreen isn't (Poseidon opening the gates being the worst offender). Also the vulture that comes to Andromeda's room. Rumor has it that Harryhausen himself viewed his work on this film as some of his weaker stuff.
- Took the Bad Film Seriously: You feel like you're watching a different movie when you see the scenes with the deities on Olympus. Not surprising given they're played by Laurence Olivier and Maggie Smith.
- Visual Effects of Awesome: The scene with Medusa is probably Harryhausen's best work. If it doesn't look that impressive to you, consider how hard it is to get the highlights cast by flickering torches right when they're being cast on something created by stop motion animation! Even today, more than 30 years later, special effects experts the world over are in awe of what Ray Harryhausen accomplished in that scene.
- What an Idiot!: Queen Cassiopeia, for comparing her daughter's beauty to Goddess Thetis right when she's standing right under her statue. The novel version suggests it was done because of her euphoria (at Calibos's curse finally being over) overturning her common sense, but even still.
- What Do You Mean, It's for Kids?: As it was made in the 1980s, you'd be shocked at some nudity in a PG-rated film. There's a full frontal scene of Danae (though she's only breast feeding) and Andromeda is later shown fully nude from behind. Keep in mind that the PG-13 rating wasn't invented yet and there wasn't as much of an aversion to women's breasts at the time, unlike now. In Canada the movie got a 14A rating, and in the UK it has a 12.
YMMV / Clash of the Titans (1981)