Dr Jekyll is a random event NPC that appears and urgently asks the player for help making a potion. If talked to, he requests a cleaned herb of the player. If the player has a herb in their inventory, he will take it and give them a potion, but if the player has no herbs he will give the player a Strength potion(2) before disappearing, saying he isn't safe with it. If the player has multiple herbs in their inventory, Dr Jekyll will only take one.
Dr Jekyll transforms into Mr Hyde.
Before the Optional Randoms & Goblins update, if ignored, Dr Jekyll would turn into Mr Hyde (level 14–159, depending on the player's Combat level) and attack the player with Melee. If killed, he would drop a potion or an empty vial. Killing him could sometimes be more profitable than giving him a herb, as he could possibly drop a Super restore potion(4).
As with all random events, if a player goes into a zone that doesn't allow random events, such as banks, or boss rooms, Dr Jekyll will disappear.
The list of potions Dr Jekyll gives for each herb:
- Dr Jekyll is a direct reference to the mystery novel Strange Case of Dr Jekyll and Mr Hyde by Robert Louis Stevenson. It is about a doctor who created a potion, splitting himself into two distinct personalities. He existed as the kind, gentle Dr Jekyll, and the fearsome, malevolent Mr Hyde.
- If a player receives this random event underwater, Jekyll will be seen wearing diving gear.