How impractical would it be to get Angela Lansbury, Tony Shalhoub, David Suchet, Emily Deschanel and Benedict Cumberbatch to star in an Expendables-esque murder mystery*? Each playing peculiar and familiar personalities, if not necessarily named "Monk" and "Bones." I promise this isn't an excuse to have an 88-year-old Lansbury hit on Big Ben Cumberbatch, though it is an ulterior motive. No, all the detectives are on the same case to clear their names, because they are the suspects of the same locked-room murder.
Thus each will be suspicious of the others, and some directly investigating their competition. Poirot suspects Monk’s phobias are a façade that would let him get away with it; Lansbury finds Deschanel suspiciously sanguine about the whole thing. But Lansbury was a mystery novelist; could she have cooked up a murder?
*Yes, very impractical. I know.