Ψ Doctor's Lab Ψ
Now you get to finish the rest of the Doctor's Lab map! Wee! Go straight on until a gate blocks your way. Forget that and go down the ladder next to you. Save and heal, then go on your merry way toward to the designated path. Pass the obstacles until Dr.Finkelstein greets you.
The Doctor is glad to see Jack. He tells him that his assistant, Igor ran away and he is locked out of the lab without the key. Then he asks Jack to find him. Jack agrees and the Doctor thanks him, then he states the security system has gone haywire and powers up his Frog Gun to help him get through the madness.
Whoo! Now your Frog Gun can pack a punch! Literally! Anyway, go straight past the Doctor and into the 'other' (I think) lab. Continue though; be cautious of the security weapons for example buzzsaws and large electric orbs. Anyway, when you see an arrow pointing up, go left then go back and head up. (You did that just to fill the area) Follow the arrows until you reach an arrow point down at a ladder. There will be another ladder going up near by and follow the path till you reach the end! Be careful as you go, because you will be trapped by cages and assaulted by various enemies. Defeat all of the enemies in order to be released. The enemies grow in number with each cage that calls on you. When you reach the end approach the present to find... the Mayor's Name Tag! Anyway, go back and continue following the trail of arrows. It's almost over!
You'll eventually reach a room with Igor trapped and hanging on the ceiling by the Doctor's security system. So continue past him and into a room with a present. Approach it to get another Shrunken Head! Continue into a large room with a long coverbelt and use your new powerful Frog Gun to kill the bug who's bugging up the security system.
When it's destroyed, everything will turn back to normal. Backtrack back to the Doctor in the beginning in order to get an another cutscene.
Dr.Finkelstein thanks you for helping Igor escaping his nasty security system. Then he tells Jack that there is a door in his backyard that leads somewhere else. He says that it might be a clue in order to find out, what exactly is going on around here.
Now go to the ONLY place that has been unfilled (there is nothing there ), then go back to where the gate used to be. It's not there anymore! So proceed and go through the double doors to Jack's House.