Combine 3D plots with different ranges into one

The following script generates two plots in a row, both of them controlled by Manipulate. I would like to combine them together in one.

The problem I don't know how to solve is that the plotting region in Q is different for the two plots, even though it is included in the range $Q \in [0,1]$.

Manipulate[Row[{
Plot3D[{
(1 - 2 Q - Sqrt[1 - Δ^2] Cos[2 θ]) (1 + Sqrt[1 - Δ^2] Cos[2 θ])
}, {θ, 0.001, π/2 - 0.001}, {Q, 0, Min[((1 - Δ^2) Sin[2 θ]^2)/(2 (1 + (-1)^0 Sqrt[1 - Δ^2] Cos[2 θ])), -(-1)^0 Sqrt[1 - Δ^2] Cos[2 θ]]},
AxesLabel -> Automatic, PlotRange -> {Automatic, Automatic, {0, 1}}, ImageSize -> Large
],
Plot3D[{
(1 - Sqrt[1 - Δ^2] Cos[2 θ]) (1 - 2 Q + Sqrt[1 - Δ^2] Cos[2 θ])
}, {θ, 0.001, π/2 - 0.001}, {Q, 0, Min[((1 - Δ^2) Sin[2 θ]^2)/(2 (1 + (-1)^1 Sqrt[1 - Δ^2] Cos[2 θ])), -(-1)^1 Sqrt[1 - Δ^2] Cos[2 θ]]},
AxesLabel -> Automatic, PlotRange -> {Automatic, Automatic, {0, 1}}, ImageSize -> Large
]
}], {{Δ, 0}, -1, 1}]

PS The range in $\theta$ is $[0.001, \pi/2 -0.001]$ to prevent errors.

• What is wrong with using Show to combine them and then use PlotRange->All? screen shot !Mathematica graphics – Nasser Mar 5 '15 at 7:16
• Good job Nasser, post the answer. Thanks @Kuba for editing – Nicola Mar 5 '15 at 7:23 