>>The Details method is never called :( I don't know how to really trace jquery as the underlying code is too hard for me. I see something is going on in the debugger, but I never see any alert.
>>
>>I've changed the code to
>>
>>

>>  $.getJSON(url, id, function (data) {
>>                    //  setFormControls(data.Id, data.Role, data.Location, data.JobType, data.Description);
>>                    alert(data);
>>                });

>>
>>Do you or anyone see what is wrong here?
>
>If it's not returning then presumably the url is wrong. Does the controller get hit?

Ok, I fixed the call to getJSON (should have been url, function(data)) instead and now it fires.

Now, how can I see what it's returning?

I put in immediate window

Json(client, JsonRequestBehavior.AllowGet)

// this is what I got
{System.Web.Mvc.JsonResult}
    base {System.Web.Mvc.ActionResult}: {System.Web.Mvc.JsonResult}
    ContentEncoding: null
    ContentType: null
    Data: {System.Data.Entity.DynamicProxies.Client_8B8510D35F377BDF2801C2613DF2C7A2FC849E56C6D6F82D8975364BC7D1076E}
    JsonRequestBehavior: AllowGet
    MaxJsonLength: null
    RecursionLimit: null

But I do not see how can I see the actual data now?
Ok, looking at http://knockoutjs.com/documentation/json-data.html now. I think my head will explode at some point.