The twisted undercurrent of Tom and Greg's relationship is on full display in the 'Succession' season 4 premiere

Greg and Tom are one of many important pairings in "Succession."

Will Varner/Insider, Macall B. Polay/HBO

• Ever since the pilot episode of "Succession," Tom and Greg have made an odd couple. 
• What was once plausibly just a funny "bromance" is now a nuanced — if twisted — portrait of male intimacy.
• The first episode of the season establishes a new level of tension between the two floundering men. 

Warning: Spoilers ahead for season four, episode one of "Succession."

"Succession"...