Why it's error...

var restaurantNames = ["Cafe Deadend", "Homei", "Teakha", "Cafe Loisl", "Petite Oyster", "For Kee Restaurant", "Po's Atelier", "Bourke Street Bakery", "Haigh's Chocolate", "Palomino Espresso", "Upstate", "Traif", "Graham Avenue Meats And Deli", "Waffle & Wolf", "Five Leaves", "Cafe Lore", "Confessional", "Barrafina", "Donostia", "Royal Oak",]
var resturantImages = ["cafedeadend.jpg", "homei.jpg", "teakha.jpg", "cafeloisl.jpg", "petiteoyster.jpg", "forkeerestaurant.jpg", "posatelier.jpg", "bourkestreetbakery.jpg", "haighschocolate.jpg", "palominoespresso.jpg", "upstate.jpg", "traif.jpg", "grahamavenuemeats.jpg", "wafflewolf.jpg", "fiveleaves.jpg", "cafelore.jpg", "cofessional.jpg", "barrafina.jpg", "donostai.jpg", "royaloak.jpg", "thaicafe.jpg"]
var restaurantLocations = ["Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Sydney", "Sydney","Sydney", "New York", "New York", "New York", "New York", "New York", "New York", "New York", "London", "London", "London", "London",]
var restaurantTypes = ["Coffee & Tea Shop", "Cafe", "Tea House", "Austrian /Causual Drink", "French", "Bakery", "Chocolate", "Cafe", "American /Seafood", "American", "American", "Breakfast & Brunch", "Coffee & Tea", "Coffee & Tea", "Latin American", "Spanish", "Spanish", "Spanish", "British", "Thai"]

var restaurantIsVisited = [Bool](count: 21, repeatedValue: false)

override func viewDidLoad() {
    super.viewDidLoad()

    // Uncomment the following line to preserve selection between presentations
    // self.clearsSelectionOnViewWillAppear = false

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
            return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
           return restaurantNames.count
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath IndexPath:NSIndexPath) -> UITableViewCell {

  let cellIdentifer = "Cell"
  let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifer, forIndexPath: IndexPath) as! RestaurantTableViewCell

    cell.nameLabel.text = restaurantNames[IndexPath.row]
    cell.thumbnailImageView.image = UIImage(named: resturantImages[IndexPath.row])
    cell.typeLabel.text = restaurantTypes[IndexPath.row]
    cell.loactionLabel.text = restaurantLocations[IndexPath.row]
    cell.thumbnailImageView.layer.cornerRadius = 30.0
    cell .thumbnailImageView.clipsToBounds = true
    return cell

    let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
    optionMenu.addAction(cancelAction)

    let callActionHandler = { (action:UIAlertAction!) -> Void in
        let alertMessage = UIAlertController(title: "Service Unavailable", message: "Sorry, the call feature is not available yet. Please try later", preferredStyle: .Alert)
        alertMessage.addAction((UIAlertAction(title: "OK", style: .Default, handler: nil)))
        self.presentViewController(optionMenu, animated: true, completion: nil)

    let isVisitedAction = UIAlertAction(title: "I've been here", style: .Default, handler: {
    (action:UIAlertAction!) -> Void in

        let cell = tableView.cellForRowAtIndexPath(indexPath)
        cell?.accessoryType = .Checkmark
        self.restaurantIsVisited[indexPath.row] = true
    })

    optionMenu.addAction(isVisitedAction)

    self.presentViewController(optionMenu, animated: true, completion: nil)

    tableView.deselectRowAtIndexPath(indexPath, animated: false)

}