Not to be a pedant but it's Kinvig, and that at least had Prunella Gee in a sort of sub-Sibyl Danning bacofoil outfit, and the rather droll Tony Haygarth and Colin Jeavons.

Nigel Kneale should stick to the grim stuff though.

L&M was rather like an episode of Kinvig turning up halfway through Quatermass. Doesn't fit. Destroys the tempo, destroys the flow.