"People think of him as a revolutionary or a figure of fun or a madman. There are so many aspects to him that we know really little about him, just the information that was given to us through a historian, a Roman historian called Suetonius, and he was from the other side of the family, so Suetonius paints Caligula as a very wicked madman, and that's the only reason that Suetonius considers why he did so many, on the face of it, crazy things. My interpretation of the character is not quite like that."

“I do recall one particular night shoot… We were called to the set at four o'clock in the afternoon. As usual, nothing was ready. They'd built a set of Tiberius's grotto, on three acres, and were assembling all of the extras and background. The producers worriedly asked if I would go into Peter's trailer and go through the lines with him, which we did few times.And then he told me the most remarkable story – whether it is true or not I have no idea – about his grave-robbing Etruscan tombs. He said the best way to find Etruscan jewellery and artefacts was to find the drains in the tombs, and very gingerly sift through them with your fingers because, as the bodies decompose, all of the artifacts deposit themselves into the channels. The thought of Peter O'Toole on his hands and knees in an Etruscan catacomb makes for a lovely image.We spent hours and hours in this trailer. He was smoking … it certainly wasn't tobacco. By the time we got onto the set, 12 hours had passed. We couldn't believe our eyes: the set was covered with people engaging in every sexual perversion in the book. We were totally bemused.Peter would start off his speech, "Rome was but a city..." then pause, look around, and say to me: "Are they doing the Irish jig over there?" I'd look over and there would be two dwarves and an amputee dancing around some girls splayed out on a giant dildo. This went on quite a few times.”

“The Roman Empire, like any other empire, was made up purely of bureaucrats, the army, the priests and everything else, and he systematically goes from one institution to the other, trying to provoke them and trying to get an action out of them, and this is why in our view the misconception is that Caligula was completely mad... Anyway, he tries to destroy the institutions. Of course, naturally, he never fails. I mean, he does fail, simply because it's impossible to destroy a bureaucracy, and I think that is a very relevant point for modern-day audiences.”