“Coroner” (The CW — season premiere, June 2)

Still struggling with the loss of her boyfriend Liam Bouchard in the Season 3 finale, Dr. Jenny Cooper (Serinda Swan) resolves to start anew by undertaking the new cases coming her way as this medical mystery drama returns for its fourth season. First, though, in the premiere “Emerge,” Jenny tries to take a vacation from death with a holiday break in a small town. Instead, she happens across a mysterious dead body that stirs suspicion. Roger Cross, Ehren Kassam, Nicholas Campbell and Tamara Podemski also return.