I'm making a spectate option for my game, I need it to return the camera to a part?

So, this is what I'm trying to make. I'm making a option where you click on the player to spectate them. It works fine, but my game uses camera manipulation, so the camera is fixed to the part until they choose their team. When you stop spectating a player it returns your camera to the normal camera. I need it to return the camera back to the part that I am using. I'm sorry the script is soo long, I've tried modifying parts of it, but I couldn't find what I need to change. Any help will be appreciated, thanks!

wait()
while not script.GUI.Value do wait() end
gui = script.GUI.Value
playergui = gui.Parent
player = playergui.Parent
while not player:FindFirstChild("Backpack") do wait() end
backpack = player.Backpack

while not player.Character do wait() end wait()

window = gui.Window
frame = window.Frame

function stopWatching()
	local cam = workspace.CurrentCamera
	cam.CameraSubject = player.Character.Humanoid
	cam.CameraType = "Custom"
	watching = nil
end

function watch(plr)
	window.Visible = false
	if not plr.Character then return end
	local human = plr.Character.Humanoid
	if not human then return end
	local cam = workspace.CurrentCamera
	cam.CameraSubject = human
	cam.CameraType = "Custom"
	human.Died:connect(function ()
		if watching == plr then wait(3) stopWatching() end
	end)
	watching = plr
end

player.Character.Humanoid.Died:connect(function () stopWatching() watch = function () end end)
gui.Changed:connect(function (p)
	if p == "Parent" and not gui.Parent then
		stopWatching()
	end
end)

function update()
	if not window.Visible then return end
	frame:ClearAllChildren()
	local fw = window.Frame.AbsoluteSize.X - 10
	local fh = window.Frame.AbsoluteSize.Y - 10
	local bw = 100
	local bh = 100
	local cols = math.floor(fw / (bw + 10))
	local rows = math.floor(fh / (bh + 10))

	local players = game.Players:GetChildren()
	for k, v in pairs(players) do if v == player then table.remove(players, k) end end
	local n = 0
	local col = 0
	local row = 0
	for i = 1, #players do
		local plr = players[i]
		local b = Instance.new("ImageButton", frame)
		b.Image = "http://www.roblox.com/Thumbs/Avatar.ashx?username=" .. plr.Name
		b.Size = UDim2.new(0, bw, 0, bh)
		b.Position = UDim2.new(0, 5 + col * (bh + 10), 0, 5 + row * (bw + 10))
		b.AutoButtonColor = true
		b.BackgroundColor3 = Color3.new(0, 0, 0)
		local l = Instance.new("TextLabel", b)
		l.Position = UDim2.new(0.5, 0, 0.5, 0)
		l.Text = plr.Name
		l.Font = "ArialBold"
		l.FontSize = "Size14"
		l.TextColor3 = Color3.new(1, 1, 1)
		if plr.Character:FindFirstChild("Survival") then
			l.TextColor3 = Color3.new(1, .8, .8)
		end
		l.TextStrokeColor3 = Color3.new(0, 0, 0)
		l.TextStrokeTransparency = 0
		b.BorderColor3 = Color3.new(1, 1, 1)
		b.MouseButton1Down:connect(function ()
			watch(plr)
		end)
		col = col + 1
		if col > cols then col = 0; row = row + 1 end
		wait()
	end
end

window.Visible = false

gui.TextButtonMain.MouseButton1Down:connect(function ()
	if watching then
		stopWatching()
	else
		window.Visible = not window.Visible
		update()
	end
end)