A plurality of controllable devices is in communication with and remotely operable by a media system controller. A storage device stores associations between respective passkeys and one or more of the controllable devices that are currently associated therewith. The controller generates a passkey in response to an occurrence of a first event associated with a particular one of the controllable devices, stores in the storage device an association between the passkey and the particular one of the controllable devices, and the passkey is displayed by the particular one of the controllable devices. The passkey is entered into a mobile device by a user. The controller receives the passkey from the mobile device, finds the particular one of the controllable devices currently associated with the passkey, and operates the particular one of the controllable devices in dependence upon commands received from the mobile device until an occurrence of a second event.