Alright, here it goes:
Prof. Dr. Wotan Runenberg: Grenadier Nightmares 618 Mad Scientists
Grandpa Ludvig, the Brain: Grenadier Nightmares 618 Mad Scientists
Horatio, manic-depressiv son: RAFM CoC 2902 Professor
Hekla von Runenberg: Ral Partha Ravenloft 11-123 Ivana Boritsi
Franz-Wotan, a failed experiment: Ral Partha Ravenloft 11-122 Frantisek Markov
Shmoo, Hekla's "dog": RAFM CoC 2923 Dimensional Shamblers
Picking the figures from my lead pile and arranging a nice consistent family portrait was real fun, preparing them for my custom made bases was a nightmare as most of them come with very thick integrated bases. Removing those without damaging the feet of the minis was a real challenge, especially when it came to Shmoo: all four limbs were broken during the process and had to be completely resculpted, a new tail was added on top. And please keep in mind that those miniatures are true 25 mm ones, they will not easily fit in with, for example, Artizan Pulp figs.
The bases were custom made to represent parquet floor: very thin pieces of veneer were epoxied to some coins (from Ex-Jugoslavia ...), cut out and filed smooth after curing and then varnished with 6 coats of gloss varnish, sanding in between each coat to get a very smooth and glossy surface.