Complex sentence: Weisberg also has a pilot in development, an untitled thriller centered on young CIA agents, which is being developed at Fox and will be executive produced by Weisberg, Brian Grazer and Paul Greengrass.
Split into simpler sentences: Weisberg also has a pilot in development at Fox, an untitled thriller centered on young CIA agents. It is being developed and will be executive produced by Weisberg, Brian Grazer and Paul Greengrass.