Sidechains in cryptocurrency have been a relatively hot topic recently with currencies like Cardano and Lisk building functionality around them. Security concerns around sidechains were discussed in this episode. The crew talked about the Bitgrail hack, a 0-day vulnerability in Bitmessage, and the next dark web currency. Also discussed was how SETI (Search for Extraterrestrial Intelligence) is upset about the lack of availability of GPU's to use in their search for aliens.