Go Froth and Multiply

In a bind, dying Ygor prepared
That his mind and the Monster were paired
In this cracked masquerade
Both this actor portrayed
Now combined, it's Lugosi, but squared.

In The Ghost of Frankenstein (1942), Béla Lugosi played Ygor, who had his brain transplanted into the Monster, played by Lon Chaney. In that film's sequel, Frankenstein Meets the Wolf Man (1943), Lugosi plays the Monster with the brain of Ygor (pictured). This was convenient, as the Monster was supposed to speak with Ygor's voice, which had been dubbed into Chaney's monster in the previous film. But a preview audience disapproved of the Monster speaking with Lugosi's Hungarian accent, and all his dialog was cut. Clear? 
Title by multi-purpose David Cairns.