Achieving world fame now though movies, this was originally a one-off pilot episode written for Rowan Atkinson by Richard Curtis and Ben Elton. Pretty much as a vehicle for Rowan's amazing physicality.
In the first episode Mr Bean actually barely spoke - maybe one word in the first 30 minutes. As the series was extended and then the film made the character became more capable of speech and the jokes less subtle.
Look up the early episodes if you want a proper chuckle though, as they are brilliant