This is a Marconi! This cocktail is mentioned 2x in Danger 5, but the recipe is not given. We found this recipe:
5 parts champagne, 2 parts Aperol, 1 part gin, pour gin and Aperol over ice, add champagne, garnish with lemon wedge, stir….the perfect Marconi. Recipe found here: http://www.thespir.it/cocktail-recipe/marconi/
We imagine an above satisfactory vodka Marconi could be made with vodka in place of the gin.
Cheers! And as always, Kill Hitler!