Based on the query “polskie seriale 888,” this appears to refer to a specific niche, error code, or a misremembered title, as there is no widely known Polish TV series titled exactly “888.”
However, the number “888” is famously associated with the classic Polish comedy series (The World According to the Kiepscy). In that show, the main character, Ferdynand Kiepski, often uses a fictional, reverse-charge phone number: 888-888-888 . polskie seriale 888