which episode was Transmitted on friday if the episode of "414 insanely twisted shadow planet" was transmitted on tuesday? 
CREATE TABLE table_18173916_8 (friday VARCHAR, tuesday VARCHAR)
SELECT friday FROM table_18173916_8 WHERE tuesday = "414 Insanely Twisted Shadow Planet"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18173916_8 (friday VARCHAR, tuesday VARCHAR) Question: which episode was Transmitted on friday if the episode of "414 insanely twisted shadow planet" was transmitted on tuesday?  [/INST] SELECT friday FROM table_18173916_8 WHERE tuesday = "414 Insanely Twisted Shadow Planet" </s>