Find Me in Paris - Season 1 Episode 11

After building the portable portal, the Time Collectors double-cross Henri and travel to the present to find Lena and the timepiece. Henri manages to escape and follows them through the portal. Meanwhile, due to a prank gone wrong, Lena and her comrades find themselves locked in the opera's underground tunnels. As they separate in small groups to find an exit, Lena and Max partner up, oblivious that Henri, panicked, has just landed in the present to look for Lena.