Just caught the last ten minutes of Episode 2 of Roger Law's 'Wow! How Did They Do That?' in which Law was talking to special effect technicians - digital and physical. Looks to me as if this Radio 4 series of short docs will be of interest to you lot, so here's the link to the 'listen again' option. Today's episode is not yet available, but will be very soon. There are also some visual clips and interviews in support of the programmes after the jump.