We have come to the end of the line
For these mummers stupendous, divine
In the cast there's just Lon
He's the last, all are gone
Save that bum 'round the bend, Carradine.
In the House of Dracula (Erle C. Kenton; 1945), Lon Chaney Jr as the Wolf Man and John Carradine as Dracula are the only actors left providing continuity with the previous films in the series. (Relative newcomer Glenn Strange as the Monster doesn't count.)