At the end, the girl gets free but doesn't untie the boy, instead running off immediately before the man returns. I don't know French, but I'm guessing she ran because she saw the man coming back and realized she wouldn't have time to untie the boy, and if she stuck around, she'd only be recaptured.
Lola and the "Sardines" (That's what the show's title translate into in English: "The Companions of Adventure: Lola and the Sardines") are tied up in pajamas and barefoot, crying about how doomed they are (as best I can make out with YouTube's auto translate feature, as I do not know French, and the auto translate is very spotty on picking up dialog).
And then it turns out they're filming a movie.
The bare feet and sheer contrivedness of the situation honestly make me wonder if some writer didn't slip this in because they really wanted to see it happen.
We can hear Lola mmmph against her gag, and we even get visible untying, but the scene really could have used more camera angles. You do at least get to see her throw the gag away, which is a cute detail.
This is sadly the last one for now, even though I know more exist (the theme song even shows a scene from an episode that I've seen before but never saved, which later disappeared from the internet).
I turned on translated closed captions, and flawed as they are, I could at least tell that one of the boys said, "It's not fair. It's always the girls who get kidnapped" (Not true - some episodes have boys get kidnapped, but I am not uploading the pictures from those) before saying, "If I were you, I wouldn't bring her back." Harsh! The girl in question is Lola herself (as the show is subtitled "Lola and the Sardines").
I know there's more out there somewhere, if not on this list. I remember a scene where Lola was tied to a post in a shed with rope and cleavegagged, but that's not in any of these episodes. I'd love to see that again.
The theme song in season 3 shows bits of this scene, so I think it's a season 3 episode.