If I Had You is a one-off British crime drama television film, starring Sarah Parish, Poppy Miller, and Paul McGann.
Parish stars as police detective Sharon Myers, who moves from the big city back to her small hometown to investigate a murder.
[2] Sharon Myers (Sarah Parish) unexpectedly turns up at a school reunion party being held in her birthplace of Luckwell, twenty years after leaving the village.
She bumps into her childhood best friend, Helen Andrews (Poppy Miller), who is heavily pregnant, and attending the party with her current husband, Phillip (Paul McGann).
Meanwhile, D.C. Marcus Watson (Andrew Buchan) discovers that only three necklaces of the kind Lesley was wearing have been bought locally in the past six months, one of which was purchased by a cash-buying customer, who matches Phillip's description.
Harry, however, informs Sharon that Paul denied all knowledge of the e-mails, and that in her absence, he has applied for a warrant to search Helen and Phillip's house.
In order to point suspicion in Harry's direction, she accuses him of holding a flame for Helen, and alleges that his grudge against Phillip is purely personal.
Suspecting that Sharon may tamper with the DNA evidence found on the lipstick in Phillip's office, Harry asks the lab to contact him - and him only - with the results.
Phillip realises that Sharon is not the killer, and that Helen in fact murdered Lesley after witnessing them having sex on the night of the school reunion.