LONDON – “Doctor Who” and Eurovision unite for an evening of music and intergalactic adventure on Saturday — all thanks to Russell T Davies.

Before fans tune in for the annual song contest, they can enjoy Ncuti Gatwa’s Doctor and Varada Sethu’s Belinda Chandra attending the Interstellar Song Contest in an episode of the sci-fi series.

In real life, the Eurovision Song Contest is an annual musical competition and TV event that sees 37 countries compete for a crystal microphone trophy over a four-hour live broadcast. In the interstellar version, aliens from 40 different worlds vie to win, also by singing.

Davies says it took three years to pull it off the doubleheader because they had to work with the BBC to set the schedule and storylines in stone to ensure a perfect alignment.

Britain’s Sam Ryder took a “Space Man” to Eurovision before, in 2022. Now, Gatwa will read out the U.K.’s jury scores during the song contest’s grand final, held this year in Basel, Switzerland.

Talking to The Associated Press, Davies says that both Eurovision and “Doctor Who” share the DNA of old-fashioned Saturday night television, making the combination “irresistible.”

This conversation has been edited for clarity and brevity.

AP: Do you feel that Eurovision and “Doctor Who” naturally share a kind of fandom?

DAVIES: I almost think every episode of “Doctor Who” is a great big celebration, sort of noise and color and spectacle, and that sums up Eurovision as well. In pitching this to Disney+ as well it’s like, “Look we’re going out in 60 of your territories” and Eurovision itself has a viewing figure that some years is bigger than the Super Bowl. There’s not many shows that can say that on planet Earth.

AP: How much fun did you have with the lore of Eurovision?

DAVIES: It’s enormous fun. It could be said if you’ve never seen a single Eurovision Song Contest in your life, you can still come along and watch this. It’s the kind of thing we’d have made up for a “Doctor Who” story anyway.

One day I’ll do that “ABBA Voyage” story where the holograms come to life and start killing people. That’s the best idea ever. We’ve got to do that one then. Can you imagine? That would be just amazing. I think there might be some copyright problems with that but we’d overcome them.

The actual pitch for the story to Juno (Dawson), who wrote it, was Eurovision meets “Die Hard.” So as you will see, the moment it starts, there’s trouble, someone’s out to sabotage it. There are villains behind the scenes trying to disrupt the program. All chaos is let loose and the rest of the episode is spent saving people’s lives after that.

AP: How about the songs?

DAVIES: I think there’s four songs in total (by Murray Gold). Obviously we don’t get to all 40 planets with their songs, but it was a very big production. We had to hive this off into its own production unit. There are scenes in the television gallery, where 40 different monitors have output of 40 different screens. And that’s all been fed in live. That’s not done with green screen afterwards, that’s all stuff they’d already shot. Crowds, acts, rehearsals, backstage, presenters, all of that stuff, playing onto that set, so it’s terribly complicated.

AP: Is this the most expensive episode of “Doctor Who”?

DAVIES: Frankly, they’re all expensive. It was a lot, yes. It had to be planned very far in advance, more than any. Once you plan something carefully, then it costs less just because you’re not busking. We allocate each story more or less the same amount of money. So I think it ends up costing as much as the others, but it just looks so good because they had so much time to plan it.

AP: Am I allowed to ask how much an episode normally costs?

DAVIES: We never say that. I don’t know why, but we just don’t ever do it. I don’t think they’d tell me. I’d faint.

AP: Are you planning to watch Eurovision this year?

DAVIES: Yes, I will be. This will be a great night. I always sit and watch “Doctor Who” — I’m old-fashioned — on its old-fashioned BBC One transmission at 7 o’clock at night.

I know people who have Eurovision parties, which I’ve never gone to actually. Look at my life, it’s devoted to television. I can’t bear other people talking over it. That would just be a nightmare. So I will be sitting in. I’ll get some nice dinner. I’ll be a very happy man.

AP: Have you got any favorites for this year?

DAVIES: I would like to go on a date with the man from Cyprus (Theo Evan). He’s beautiful. I do like the U.K. entry this year (“What the Hell Just Happened?” by Remember Monday). I have a theory it’s being underestimated in Great Britain. Just because we’re so used to losing. We’ve won five times, everyone. But this country gets a bit cynical about Eurovision sometimes. But I love our song. I think it’s got a very memorable chorus.