Complex sentence: John now has a girlfriend, Mary Morstan (Amanda Abbington), to whom he intends to propose in a restaurant; at this point, Sherlock, disguised as a French waiter, approaches the couple, but is not immediately recognised by John.
Split into simpler sentences: John now has a girlfriend, Mary Morstan (Amanda Abbington), to whom he intends to propose in a restaurant. At this point, Sherlock, disguised as a French waiter, approaches the couple, but is not immediately recognised by John.