Electronic apparatus comprising - a receiver for reception of television programmes or radio broadcast programmes of different stations, wherein - the receiver includes a tuning unit for tuning the receiver to one of the television or radio broadcast programmes of the different stations and/or - a first memory unit for storage of television or radio broadcast programmes of different stations and - a display unit for displaying the television or radio broadcast programmes received by the receiver or for reproduction of television or radio broadcast programmes from television or radio broadcast programmes stored on a storage medium and/or in the first memory unit and - a selecting unit by means of which the receiver and/or the display unit is or are controllable in such a way that the receiver switches over to one of the television or radio broadcast programmes or the display unit undertakes display of one of the television or radio broadcast programmes stored on the storage medium or in the first memory unit and - a control unit which stores in a second memory unit the supplementary data, which is transmitted with respect to the television or radio broadcast programmes of different stations, and/or the supplementary data, which is stored on the storage medium or in the first storage unit with respect to the stored television or radio broadcast programmes, in the form of a respective data set in association with the associated television or radio broadcast programme and - a third memory unit in which at least one second data set can be stored by means of the control unit, wherein the control unit compares the at least one second data set storable in the third memory unit with the data sets stored in the second memory unit and in the case of correspondence blocks activation of the selecting unit, characterised in that the control unit undertakes the comparison of the at least one data set in the third memory unit with the data sets, which are stored in the second memory unit, continuously before and decoupled in terms of time from activation of the receiver for selection of a television or radio broadcast programme of one of the different stations or selection of the display of one of the television or radio broadcast programmes, which are stored on the storage medium or in the first memory unit, by means of the selecting unit and in the case of correspondence or at least partial correspondence between the at least one stored second data set and a data set stored in the second memory unit the control unit marks the corresponding data set stored in the second memory unit, in the case of activation of the receiver by means of the selecting unit for selection of a television or radio broadcast programme of one of the different stations or in the case of selection of display of one of the television or radio broadcast programmes, which are stored on the storage medium or in the first memory unit, by means of the selecting unit or the activation for indication of the supplementary data the control unit does not undertake activation of the receiver or selection of the display or the supplementary data if the data set, which is stored in the second memory unit and which is associated with the selected television or radio broadcast programme, is marked, the control unit erases a data set stored in the second memory unit if the associated transmission date and transmission time are exceeded by more than a settable first time delay or if the transmission end time is reached and/or is exceeded by a settable second time delay and the control unit erases a data set stored in the second memory unit if the associated television or radio broadcast programme in the first memory unit has been erased or if the associated storage medium has been removed. - a receiver for reception of television programmes or radio broadcast programmes of different stations, wherein - the receiver includes a tuning unit for tuning the receiver to one of the television or radio broadcast programmes of the different stations and/or - a first memory unit for storage of television or radio broadcast programmes of different stations and - a display unit for displaying the television or radio broadcast programmes received by the receiver or for reproduction of television or radio broadcast programmes from television or radio broadcast programmes stored on a storage medium and/or in the first memory unit and - a selecting unit by means of which the receiver and/or the display unit is or are controllable in such a way that the receiver switches over to one of the television or radio broadcast programmes or the display unit undertakes display of one of the television or radio broadcast programmes stored on the storage medium or in the first memory unit and - a control unit which stores in a second memory unit the supplementary data, which is transmitted with respect to the television or radio broadcast programmes of different stations, and/or the supplementary data, which is stored on the storage medium or in the first storage unit with respect to the stored television or radio broadcast programmes, in the form of a respective data set in association with the associated television or radio broadcast programme and - a third memory unit in which at least one second data set can be stored by means of the control unit, wherein