Tony Goldwyn stars in this one as twin brothers. The wife of one goes missing and suspicion falls naturally on the husband. However, things get complicated when it turns out that he has a twin, who also has a possibly shady past and who might have been flirting with his brother's wife.
It's slightly different to other episodes in the series, because it's less about a race against time as an interrogation of two people, either one, or both of whom might be responsible.
It's not my favourite episode - after all the 'twin' thing has been done again and again. But it is interesting, because it's not clear who's the culprit.
The ending is realistic, but deeply dissatisfying, only because I like things wrapped up neatly and the bad guys getting their comeuppance.