Doctor Who S11.7: “Kerblam!” delivers a mixed bag…

As Jodie Whittaker settles quite nicely into the role of The Doctor, the series itself seems to be taking an alternating pattern of light and heavy;  going from serious, deeply topical material one week to lighter, frothier adventures the next.  After last week’s powerful and original  “Demons of the Punjab,”  I was prepared for this…