Complex sentence: Whenever there is a "brilliant idea" at the bus depot, it is usually Blakey's-which are usually elaborate schemes to temper Stan and Jack's frequent insubordination, or entrap them in their misadventures in a bid to get them fired.
Split into simpler sentences: Whenever there is a "brilliant idea" at the bus depot, it is usually Blakey's. These are usually elaborate schemes to temper Stan and Jack's frequent insubordination, or to entrap them in their misadventures in a bid to get them fired.