Mariska Hargitay and Chris Meloni joined forces in an emotional crossover event between and the new spinoff, Olivia Benson (Hargitay) and Elliot Stabler (Meloni) finally reunited in the two-hour event, which saw the shocking death of Stabler's wife, Kathy (Isabel Gillies), sparking Stabler's quest for justice. It was the reunion fans had been waiting almost a decade for after Meloni exited nine years ago. To celebrate the moment, both Meloni and Hargitay posted to Instagram. Sharing a throwback