Deal with Heck Gunderson however you think will hurt him most, or convince Phebus to let bygones be bygones.
To help Phebus get his revenge, either kill Heck Gunderson, Ted Gunderson, or both.
To get Phebus to move on with his life, a Perception check of 7 is required. Failing that check, a Speech check of 75 will convince him to go back home.
If either of the Gundersons were killed, return to Walter for your reward.
Find out the purpose behind Heck Gunderson's visit to the Ultra-Luxe.
(Optional) Ethel Phebus wants her husband, Walter, to forget about Heck Gunderson and return to their ranch. (Requires speech check of 75, end of quest if this option is chosen)
Heck Gunderson is looking for his disappeared son. Talk to Walter Phebus about this.
Take care of both Heck and Ted Gunderson, for Walter Phebus
Heck, and Ted, are taken care of. Talk to Walter about this
The Gundersons are dealt with. Walter was happy to hear the news, and took Ethel back to their home.
This quest is tied to Beyond the Beef, and depending on your actions, one of them can fail.
The choice to kill Heck Gunderson or both Ted and his father is useful if you are siding with the Legion, since the player will be able to finish the Beyond the Beef without missing a portion of Render Unto Caesar.
Bringing Ted Gunderson to Heck Gunderson during Beyond the Beef and talking to Heck will fail this quest. Walter and Ethel disappear, even if you kill Heck immediately after.