If you can stomach it, have a look at it here.
The 79-year-old, who was appearing on the show alongside Hunters co-star Logan Lerman, even appeared to forget that he was on the show at certain points.
Now, even though The One Show tends to be better known for bizarre segments in which they send - let's say - former-Olympic rower Matthew Pinsent to Burton-upon-Trent to find out how Marmite gets made, occasionally they really pull in an A-lister.
On this occasion, they managed to bag The Irishman and Heat star Pacino.
However, whilst he might be one of the most recognisable celebrities going, that doesn't mean he's ever heard of the BBC One show hosted by Alex Jones and Matt Baker.
First off, during the interview portion, Pacino said: "You always dream about the things you're doing."
Jones responded: "Did you dream about The One Show [last night]?"
There followed a silence during which it became clear that he had no idea what show he was on. Fair enough, he probably does a lot of media engagements.
Jones had to remind him: "This is The One Show!""
Then, a bit later on, Pacino got up and tried to walk off during at VT segment about his long and distinguished career.
After his escape attempt, he said: "I was just going to leave."
Baker informed him: "No, no, you're not done."
It makes for pretty awkward viewing, to be quite honest.
To be even more honest, that pretty accurately sums up the entire viewing experience of The One Show.
However, fans on Twitter have been sharing their opinion on the embarrassing encounter.
One fan said: "Al Pacino on The One Show. Painful interview with the numbskull presenters."
Another person said: "Al Pacino being on The One Show and looking utterly blank when they mentioned 'The One Show' is the most One Show thing that has ever happened."
Actually, one of the main things raised was surprise that they'd actually managed to convince someone as famous as Al Pacino to grace their sofas.
A surprised fan said: "Am I actually seeing Al Pacino on The One Show? I can only assume he got lost on the way to Graham Norton"
A second said: "Al Pacino on The One Show. Please tell me they're going to make him sit through a report on parking regulations, presented by Dom Littlewood"
The One Show is on BBC One every weeknight at 7PM.