The promotion board will be visiting the Gasforth police station and Grim and Fowler are the most likely candidates. When Grim tells Fowler that they usually go for family men, Fowler proposes to Dawkins in a most unromantic way, causing her to break up with him. 

P.C. Joe Penhale (John Marquez) has an unexpected visitor - his ex-wife Maggie (Julie Graham). She appears to have completely forgotten that they split up a couple of years ago. When he tries to tell her they are no longer married she accuses him of over-reacting, and wants to know why he packed his bags and left her. Joe struggles with a mixture of distress and elation at seeing Maggie again. He has thought about her every day since they parted. He realizes she is clearly not well, and tries discreetly to ask Dr. Ellingham about her symptoms without telling him that he is talking about his ex-wife. Meanwhile, Martin and Louisa's baby still doesn't have a name, and P. C. Penhale warns them that time is running out. If they don't register a name for the baby soon the State will step in and name the baby. After protracted discussions the couple finally reaches an agreement. 

On the eve of Memorial Day, join co-hosts Joe Mantegna ("Criminal Minds") and Gary Sinise ("CSI: New York") for a night of remembrance featuring an all-star line-up performing with the National Symphony Orchestra. The 24th annual broadcast of the NATIONAL MEMORIAL DAY CONCERT airs live from the West Lawn of the U.S. Capitol before a concert audience of hundreds of thousands, millions more at home, and to our troops around the world on the American Forces Network. 

Detroit was the birthplace of the middle-class; a great city that came with the guarantee of the American dream. Today, the Motor City is suffering from a bad case of post-industrialism. Hit with the deadly combination of myopic executives, corrupt politicians, severe racial tensions and a lack of innovation, Detroit now stands as a shell of its former self. And according to an increasingly loud chorus in the media, Detroit is "dead." But look a little closer and find that Detroit just may be the ultimate incubator for fresh ideas -- a Petri dish of creativity borne out of frustration and unwillingness to give up. With quintessential American pluck and grit, this city just may rise from the ashes thanks to a
dynamic cluster of innovators, entrepreneurs and proud, self-proclaimed "hustlers." 

In this last episode, Sagal travels to Iceland, where after the country's economic collapse, leaders decided to create a new constitution, looking to the U.S. Constitution for inspiration. This prompts Sagal to consider why our own founding document has lasted more than 225 years. He looks at the systems that have kept the Constitution healthy - amendments, judicial interpretation, checks and balances - and also at the political forces that threaten to undermine the framers' vision: excessive partisanship leading to gridlock, money in politics and gerrymandering. 

The program is an updated version of the NOVA episode "Deadliest Tornadoes." It includes new information about the May 20, 2013 tornado that swept through Moore, Oklahoma and surrounding areas. It also highlights the new radar system put in place to track tornadoes since the program originally premiered.