On Tuesday's episode of Limitless, Brian (Jake McDorman) is seeking a third bodyguard to join Mike (Michael James Shaw) and Ike (Tom Degnan) on his protection detail. One of the agents he screens, Spike (Stephen O'Reilly), is just as concerned with keeping Brian healthy as he is with keeping him safe - even if it means offering him stomach-churning concoctions to chug down.

In addition, Spike takes a very hands-on approach to the role, which Brian finds a bit unsettling, to say the least. Check out a clip from the episode in the video above.

Limitless airs Tuesdays at 10/9c on CBS.

(Full disclosure: TVGuide.com is owned by CBS.)