Emmerdale S36 E134 Episode 4700/4701 (Tue 12th June 2007)

Marlon and Eli turn up to do the job at the bookies in a stolen car, but Marlon is horrified when Eli reveals that he's brought a gun. The brothers argue and Eli goes into the bookies alone but Marlon is worried when Eli takes his time. Marlon walks in to see Eli threatening the manager and a customer with the gun and he tries to grab the weapon.