Space shadowed by obstacles, e.g., buildings and indoor structures, is traditionally considered as occupied and is unable to provide any useful incumbent services due to poor incumbent signaling. The time-frequency slots in this case are ignored for a long time and can be further used if an agile coexisting scheme is applied by secondary users (SUs). In this paper, we propose a new scheme for SUs to reuse these spatial opportunities in an incumbent digital TV (DTV) environment. These spatial opportunities can be used either by the SUs for private applications or by TV viewers (TVVs) provided that TV programs are suitably relayed. We analyze the applicability of the proposed scheme, which paves a way for enhancing the spectral efficiency in the spatial domain.