I shall turn over all my secrets to Felix, including my last great one, and then present him to the convention as my successor.

11 seconds sound clip from the Mad Monster Party? movie soundboard.

You can hear this line at 00:15:06.748 in the Blu-ray version of the movie.

Quote context

[...]

- They're both gone now, but their son, Felix is my only relative and heir.

- But why are you inviting him to this convention?

- Because, my dear, I'm retiring. Yes. Oh, don't look so unbelieving.

- I've grown a little tired of this horror business doing bad for others and very rarely getting any bad in return.

- But now that I've mastered my greatest discovery, I'd like to retire while I'm on top.

- I shall turn over all my secrets to Felix, including my last great one, and then present him to the convention as my successor.

(Frankenstein's cuckoo clock)

- 1:00. Our other friends should be traveling on their way to the island about now. I'll still have to see to their accommodations.

- You tidy up in here.

- Oh, I do hope you like Felix Flanken when you meet him. I want you two to be friends.

[...]