'Jealous I' was a British naval undertaking by MGB-697 of the 15^th Motor Gun Boat Flotilla to land and collect agents at the Pointe de St Cast on the coast of German-occupied France (28/29 October 1943).

The undertaking was initially known as 'Jealous', but became retrospectively known as 'Jealous I' after other undertakings of the same series had been planned and implemented. The first attempt on 25 October was unsuccessful as the motor gun boat arrived too late at the location required for delivery and collection, but the second attempt on 28/29 October was successful.