On Sesamstrasse, the German co-production of Sesame Street, game show host Guy Smiley was renamed Robert, in reference to Lembke. Lembke himself later guest starred on the series in 1981, hosting a version of Was bin ich? ("What Am I?," a in the vein of What's My Line?). The game was essentially focused on inside trivia, since the first round asked the Sesamstrasse characters to identify the German voice of Ernie: Gerd Duwner, appearing as himself. Another round involved the puppeteers appearing out of costume to be matched with their characters.