Many studies have shown the advantages of building multimodal systems, however not in the interactive TV application context. This paper reports on a qualitative study of a multimodal program guide for interactive TV. The system was designed by adding speech interaction to an already existing TV program guide. Study results indicate that spoken natural language input combined with visual output is preferable for TV applications. Furthermore, the user feedback requires a clear distinction between the dialogue system's domain result and system status in the visual output. Consequently, we propose an interaction model that consists of three entities: user, domain results, and system feedback.