This version is captioned, a non-captioned version can be found here.

You may have thought that cures through sleep had been fully dealt with in Episode 26, but those approaches were all about the physical context in which sleep can be ‘procured’, this episode, in line with Episode 33, takes a medicinal approach. Here are things to imbibe, smell or apply. In short, these are the pre-cursors of our sleeping pills. None of them are easily sourced today, though if you have a compliant pet obtaining the earwax of a dog may not be beyond you.