Royal Pain - S3.E20

Russell Wyndham accidentally kills his girlfriend with an enhancing drug during a lovemaking session, then seconds later... his wife Alexandra walks in. Fearing for her life after Russell threatens to kill her if she calls for help, Alexandra turns to Nick for help. Russell Wyndham though, just happens to be the 6th Duke of Stowbridge, and he'll resort to any means to cover his murky tracks and keep his regal reputation clean.