- It's a casting nightmare tohave three different people

you're trying to cast as Patrick.

One of the first auditiontapes that I saw was from Sean.

When I saw him, I couldn'tunsee him as Patrick.

- I do not know what to sayor how I can say anymore

about the children of God who are dead,

whom the sword has touched so cruelly.

- [Director] Cut.

Swipe that take, I don't need another one.

- I had the opportunity

to dip my toe into the waterinitially about 16 years ago

with the previous documentary.

I was playing the young Patrick,

so now I've got the chance

to sort of go through his experiences

in the later part of his life.

- And then, when we werelooking for a younger Patrick,

we need to have someonewho looks like Sean,

but I have to have someonewho can really play this part,

and when we came across Robert McCormack,

it was such an easy choice.

- [Director] Action.

- I'm very grateful tobe playing Saint Patrick,

because he's such an iconicfigure for the Irish people.

You celebrate everywhere around the world,

so it's very exciting to play him.

- [Jarrod] We never plannedon having John Rhys-Davies

actually play old Patrick.

- We initially just had himon to do the voiceover work

and we asked him, "Would you come over

"and play old Patrick on location?"

And he agreed.

- You see, it's the same dress.

We are playing the sameperson, Saint Patrick.

Patrick is a great paradoxof energies, and emotions,

and he's a wonderful character.

- [Jarrod] To actuallyhave John Rhys-Davies

playing the actual role,

he fits right in with our other Patrick's,

they totally work.

(inspirational music)