Frosty Spike Milligan scene with actor, Oliver Reed taking only seconds (6)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

taking only the second letters from [M]- I -[lligan] [s]- C -[ene] [w]- I -[th] [a]- C -[tor] [O]- L -[iver] [R]- E -[ed]